Biology 题库

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全英文对标 HKEAA。Paper 1 (75%) · Paper 2 Elective (25%) · SBA。所有定义须按官方英文表述背诵；osmosis/diffusion 方向表述须精确。 主观题交 英文答题批改指令 阅卷；错题录入 错题档案。

Part 1 Cell, Transport & Enzymes（Q1–Q35）

Q1 · Basic · Cell theory

Which is NOT part of cell theory? A. All living things are made of cells B. Cells are the basic unit of life C. All cells arise from pre-existing cells D. All cells have a nucleus Answer: DMarking: Prokaryotes lack nucleus; D false → correct choice.

Q2 · Basic · Organelle

Site of protein synthesis: A. Mitochondrion B. Ribosome C. Nucleus D. Golgi Answer: BMarking: ribosomes make proteins.

Q3 · Drill · Organelle function

Mitochondria are the site of ___. A. Photosynthesis B. Aerobic respiration C. Protein synthesis D. DNA storage Answer: BMarking: ATP production.

Q4 · Basic · Plant vs animal cell

Which is found in plant but not animal cells? A. Cell membrane B. Cell wall C. Mitochondria D. Ribosomes Answer: BMarking: cellulose cell wall (plants).

Q5 · Drill · Prokaryote

Bacteria are ___ cells (no membrane-bound nucleus). A. Eukaryotic B. Prokaryotic C. Multicellular D. Fungal Answer: BMarking: prokaryotes lack nucleus.

Q6 · Basic · Diffusion

Diffusion is the net movement of particles from ___ concentration to ___ concentration. A. low, high B. high, low C. equal, low D. high, equal Answer: BMarking: down concentration gradient.

Q7 · Drill · Diffusion factors

Rate of diffusion increases with ___ temperature and ___ concentration gradient. A. lower, smaller B. higher, larger C. higher, smaller D. lower, larger Answer: BMarking: more KE + steeper gradient → faster.

Q8 · Basic · Osmosis

Osmosis is the diffusion of ___ across a semi-permeable membrane. A. Solute B. Water C. Protein D. Ion Answer: BMarking: water moves down its potential gradient.

Q9 · Drill · Osmosis direction

A cell in hypotonic solution (lower solute outside) will ___. A. Shrink B. Swell/lyse C. Stay same D. Burst only if plant Answer: BMarking: water enters → swells (animal may lyse; plant turgid).

Q10 · Drill · Osmosis plant

A plant cell in hypertonic solution becomes ___. A. Turgid B. Plasmolysed C. Normal D. Larger Answer: BMarking: water leaves → protoplast pulls from wall.

Q11 · Basic · Active transport

Active transport requires ___ and moves substances ___ gradient. A. No energy, down B. Energy (ATP), against C. Diffusion, down D. Water, across Answer: BMarking: ATP, against concentration gradient.

Q12 · Drill · Active transport example

Uptake of mineral ions by root hair cells occurs by ___. A. Diffusion only B. Active transport C. Osmosis D. Evaporation Answer: BMarking: against gradient → active.

Q13 · Basic · Enzyme nature

Enzymes are biological ___ that speed up reactions. A. Carbohydrates B. Catalysts (proteins) C. Lipids D. Nucleic acids Answer: BMarking: protein catalysts.

Q14 · Drill · Enzyme specificity

The "lock and key" model describes enzyme ___. A. Denaturation B. Specificity (active site fits substrate) C. Cofactor D. pH Answer: BMarking: specific active site.

Q15 · Basic · Optimum

Each enzyme has an optimum ___ and ___ at which activity is highest. A. temperature, pH B. colour, size C. pressure, volume D. salt, light Answer: AMarking: temp & pH optimum.

Q16 · Drill · Denaturation

High temperature denatures enzyme by disrupting its ___. A. Substrate B. 3D shape (active site) C. DNA D. Membrane Answer: BMarking: shape lost → inactive.

Q17 · Basic · Enzyme rate graph

As substrate increases, initial rate ___ then ___ (saturation). A. increases, plateaus B. decreases, stops C. increases, decreases D. constant Answer: AMarking: saturation at Vmax.

Q18 · Drill · pH effect

Pepsin works best at ___ pH (stomach acid). A. 2 B. 7 C. 9 D. 12 Answer: AMarking: acidic optimum.

Q19 · Basic · Catalase

Catalase breaks down hydrogen peroxide into ___ and ___. A. H₂O, O₂ B. CO₂, H₂O C. O₂, H₂ D. H₂O, CO Answer: AMarking: 2H₂O₂ → 2H₂O + O₂.

Q20 · Drill · Amylase

Amylase digests ___ into maltose. A. Protein B. Starch C. Fat D. DNA Answer: BMarking: starch → maltose.

Q21 · Basic · Membrane structure

The cell membrane is a ___ bilayer with embedded proteins. A. Protein B. Phospholipid C. Cellulose D. Glycogen Answer: BMarking: phospholipid bilayer.

Q22 · Drill · Selective permeability

The membrane is selectively permeable because ___. A. It has no pores B. Size/charge of molecules and proteins regulate passage C. It is solid D. It blocks all Answer: BMarking: regulated passage.

Q23 · Basic · Surface area:volume

A smaller cell has a ___ surface area:volume ratio → more efficient exchange. A. Smaller B. Larger C. Equal D. Zero Answer: BMarking: small cells exchange better.

Q24 · Drill · Magnification

Drawing 5 mm object drawn 50 mm. Magnification? Answer: 50/5 = ×10. Marking: image/actual.

Q25 · Basic · Light microscope limit

Light microscopes resolve structures down to about ___ μm. A. 0.2 B. 2 C. 20 D. 200 Answer: AMarking: ~0.2 μm resolution.

Q26 · Drill · Resolution

Resolution is the ability to ___. A. Magnify B. Distinguish two close points as separate C. Focus light D. Stain cells Answer: BMarking: resolving power.

Q27 · Basic · Organ system

The ___ system transports substances in the body (mammal). A. Digestive B. Circulatory C. Respiratory D. Excretory Answer: BMarking: transport = circulatory.

Q28 · Drill · Tissue

A group of similar cells performing a function is a ___. A. Organ B. Tissue C. Organism D. Organelle Answer: BMarking: tissue definition.

Q29 · Basic · Chloroplast

Chloroplasts contain ___ which absorbs light. A. Haemoglobin B. Chlorophyll C. Melanin D. Keratin Answer: BMarking: chlorophyll captures light.

Q30 · Drill · Vacuole

Plant cells have a large central ___ for storage and turgor. A. Nucleus B. Vacuole C. Mitochondrion D. Ribosome Answer: BMarking: central vacuole.

Q31 · Basic · Cell division intro

Growth occurs via cell ___ and ___. A. Division, differentiation B. Death, fusion C. Shrinking, splitting D. Mutation, repair Answer: AMarking: division + differentiation.

Q32 · Drill · Microscope focus

To focus a light microscope, start with the ___ objective and ___ focus. A. Highest, fine B. Lowest, coarse C. Highest, coarse D. Lowest, none Answer: BMarking: low power, coarse first.

Q33 · Basic · Unicellular

An example of a unicellular organism is ___. A. Human B. Amoeba C. Tree D. Mushroom Answer: BMarking: single-celled.

Q34 · Drill · Diffusion distance

Diffusion is effective only over ___ distances. A. Long B. Short C. Any D. Infinite Answer: BMarking: short distances (cells small).

Q35 · Basic · Active vs passive

Unlike diffusion, active transport needs ___. A. A gradient B. ATP / energy C. A membrane D. Water Answer: BMarking: energy distinguishes active.

Part 2 Photosynthesis, Respiration & Physiology（Q36–Q75）

Q36 · Basic · Photosynthesis equation

6CO₂ + 6H₂O → (light) → C₆H₁₂O₆ + ___. A. 6O₂ B. 6CO₂ C. H₂O D. ATP Answer: AMarking: glucose + 6O₂.

Q37 · Drill · Light reaction

Light-dependent reactions produce ATP, NADPH and release ___. A. CO₂ B. O₂ C. Glucose D. H₂O Answer: BMarking: O₂ from photolysis of water.

Q38 · Basic · Dark reaction

The Calvin cycle (light-independent) fixes ___ into glucose using ATP/NADPH. A. O₂ B. CO₂ C. H₂O D. N₂ Answer: BMarking: CO₂ fixation.

Q39 · Drill · Limiting factor

At low light, ___ is the limiting factor for photosynthesis. A. CO₂ B. Light intensity C. Temperature D. Water Answer: BMarking: light limits when low.

Q40 · Basic · Stomata

Stomata allow gas exchange of CO₂/O₂ and loss of ___ by transpiration. A. Water vapour B. Glucose C. Protein D. DNA Answer: AMarking: transpiration = water loss.

Q41 · Drill · Chlorophyll absorption

Chlorophyll absorbs ___ and ___ light most, reflecting green. A. Red, blue B. Green, yellow C. Only green D. UV only Answer: AMarking: red & blue absorbed.

Q42 · Basic · Respiration equation

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ___. A. Light B. Energy (ATP) C. O₂ D. Starch Answer: BMarking: releases ATP.

Q43 · Drill · Aerobic vs anaerobic

Anaerobic respiration in humans produces ___ when oxygen is lacking. A. Ethanol B. Lactic acid C. CO₂ only D. O₂ Answer: BMarking: lactate in muscles.

Q44 · Basic · Yeast fermentation

Anaerobic respiration in yeast produces ___ and CO₂. A. Lactic acid B. Ethanol C. Glucose D. O₂ Answer: BMarking: ethanol + CO₂ (fermentation).

Q45 · Drill · Mitochondria count

Cells with high energy demand (e.g. muscle) have ___ mitochondria. A. Fewer B. More C. None D. Broken Answer: BMarking: more mitochondria = more ATP.

Q46 · Basic · Digestive enzyme

Protease digests ___ into amino acids. A. Starch B. Protein C. Fat D. Sugar Answer: BMarking: proteins → aa.

Q47 · Drill · Digestive site

Most digestion and absorption occurs in the ___. A. Stomach B. Small intestine C. Large intestine D. Mouth Answer: BMarking: small intestine main site.

Q48 · Basic · Bile

Bile emulsifies ___ (mechanical, not enzymatic). A. Starch B. Fats C. Protein D. Sugar Answer: BMarking: increases surface area of fats.

Q49 · Drill · Villi

Villi increase ___ area for absorption in the intestine. A. Surface B. Volume C. Weight D. Length Answer: AMarking: surface area for absorption.

Q50 · Basic · Blood components

Red blood cells transport ___; ___ fight infection. A. CO₂, platelets B. O₂, white blood cells C. Glucose, plasma D. Water, RBCs Answer: BMarking: RBC carry O₂; WBC immune.

Q51 · Drill · Heart

The ___ pumps blood to the body (left ventricle); ___ to lungs (right ventricle). A. right, left B. left, right C. atrium, atrium D. vein, artery Answer: BMarking: left→body, right→lungs.

Q52 · Basic · Double circulation

Mammals have ___ circulation (pulmonary + systemic). A. Single B. Double C. Open D. No Answer: BMarking: double circuit.

Q53 · Drill · Artery vs vein

Arteries carry blood ___ the heart; veins ___ (most, except pulmonary). A. away from, to B. to, away from C. within, outside D. above, below Answer: AMarking: arteries away, veins toward.

Q54 · Basic · Gas exchange

In alveoli, O₂ diffuses from ___ to ___. A. Blood, air B. Air, blood C. Heart, lung D. Lung, heart Answer: BMarking: alveolus air → blood.

Q55 · Drill · Breathing muscles

___ contracts to draw air in (inhalation). A. Diaphragm B. Heart C. Liver D. Stomach Answer: AMarking: diaphragm flattens ↓.

Q56 · Basic · Nephron

The ___ filters blood and forms urine. A. Nephron (kidney) B. Alveolus C. Villus D. Neuron Answer: AMarking: nephron = kidney unit.

Q57 · Drill · Excretion

The ___ removes urea and excess water (excretion). A. Kidney B. Lung C. Skin only D. Liver only Answer: AMarking: kidney main excretory.

Q58 · Basic · Nervous system

A ___ transmits nerve impulses; ___ connects neurons. A. Neuron, synapse B. Muscle, tendon C. Gland, hormone D. Bone, joint Answer: AMarking: neuron + synapse.

Q59 · Drill · Reflex arc

A reflex action bypasses the ___ for speed (goes via spinal cord). A. Brain B. Muscle C. Skin D. Heart Answer: AMarking: reflex skips brain (faster).

Q60 · Basic · Hormone

Insulin lowers blood ___ level. A. Protein B. Glucose C. Fat D. Salt Answer: BMarking: insulin → uptake glucose.

Q61 · Drill · Diabetes

Diabetes is caused by ___ insulin or resistance to it. A. Excess B. Deficient C. Normal D. No role of Answer: BMarking: insufficient insulin → high glucose.

Q62 · Basic · Plant transport

Xylem transports ___ and minerals upward; phloem transports ___. A. Water, food (sugar) B. Sugar, water C. Air, water D. Protein, sugar Answer: AMarking: xylem water, phloem food.

Q63 · Drill · Transpiration pull

Water moves up xylem mainly by ___ (transpiration pull + cohesion). A. Active pumping B. Transpiration-cohesion-tension C. Osmosis only D. Diffusion Answer: BMarking: cohesion-tension theory.

Q64 · Basic · Reproduction (flower)

The ___ produces pollen (male); ___ is the ovary (female). A. Stamen, pistil B. Pistil, stamen C. Petal, sepal D. Root, stem Answer: AMarking: stamen male, pistil female.

Q65 · Drill · Fertilisation

In humans, fertilisation occurs in the ___. A. Uterus B. Fallopian tube (oviduct) C. Ovary D. Vagina Answer: BMarking: oviduct (Fallopian tube).

Q66 · Basic · Mitosis

Mitosis produces ___ genetically identical daughter cells (growth/repair). A. 2 B. 4 C. 1 D. 8 Answer: AMarking: 2 diploid identical.

Q67 · Drill · Meiosis

Meiosis produces ___ genetically different gametes with half chromosome number. A. 2 B. 4 C. 1 D. 8 Answer: BMarking: 4 haploid gametes.

Q68 · Basic · DNA

DNA is a double ___ made of nucleotides (A-T, G-C). A. Helix B. Circle C. Line D. Square Answer: AMarking: double helix.

Q69 · Drill · Base pairing

In DNA, A pairs with ___; G pairs with ___. A. T, C B. C, T C. G, A D. T, G Answer: AMarking: A-T, G-C.

Q70 · Basic · Gene

A gene is a sequence of DNA that codes for a ___. A. Carbohydrate B. Polypeptide / protein C. Lipid D. Mineral 答案本题Answer: BMarking: gene → protein.

Q71 · Drill · Allele

An organism with two identical alleles is ___; two different is ___. A. heterozygous, homozygous B. homozygous, heterozygous C. dominant, recessive D. mutant, normal Answer: BMarking: homozygous = same; heterozygous = different.

Q72 · Basic · Dominant/recessive

In peas, T (tall) dominant over t. Tt phenotype is ___. A. Short B. Tall C. Medium D. None Answer: BMarking: dominant T expressed.

Q73 · Drill · Punnett

Cross Tt × Tt. Probability of tt offspring? A. 0% B. 25% C. 50% D. 75% Answer: BMarking: 1/4 tt.

Q74 · Basic · Ecosystem

A community + its physical environment = ___. A. Population B. Ecosystem C. Organism D. Biome Answer: BMarking: ecosystem definition.

Q75 · Drill · Food chain

Energy flows from producers to ___ to ___ (trophic levels). A. consumers, decomposers B. sun, producers C. plants, soil D. apex, base Answer: AMarking: producers→consumers→decomposers.

Part 3 Structured & Applied Biology（Q76–Q110）

Q76 · Structured · Osmosis experiment

A potato strip in salt solution loses mass. Explain using water potential. Answer: Salt solution has lower water potential than cell sap → water moves out of cells by osmosis → cells flaccid → strip loses mass. Marking: water potential gradient (2); net water out (1).

Q77 · Structured · Enzyme experiment design

How to test effect of temperature on amylase? Answer: Set up amylase + starch at controlled temps (e.g. 0/20/40/60°C); use iodine to time disappearance of starch; repeat; plot rate vs temp; find optimum. Marking: controlled variable (1); method (1); measure (1).

Q78 · Structured · Photosynthesis limiting factor

A graph shows rate plateaus as light increases but rises when CO₂ increases. Identify limiting factor at high light. Answer: At high light, CO₂ (or temperature) becomes limiting; increasing light no longer raises rate. Marking: identify CO₂ limiting (2).

Q79 · Structured · Aerobic respiration

Give the word equation and state where it occurs. Answer: glucose + O₂ → CO₂ + H₂O + ATP; in mitochondria (cytoplasm for glycolysis first). Marking: equation (1); site (1).

Q80 · Structured · Compare respiration

Complete vs incomplete respiration: products differ how? Answer: Complete (aerobic) → CO₂+H₂O+much ATP; incomplete (anaerobic) → lactate (human) or ethanol+CO₂ (yeast) + little ATP. Marking: aerobic (1); anaerobic products (1-2).

Q81 · Structured · Circulatory adaptation

Why do capillaries have thin walls and many branches? Answer: Thin walls (one cell) → short diffusion distance; extensive network → large surface area for exchange. Marking: thin (1); area (1).

Q82 · Structured · Gas exchange surface

State three features of an efficient gas-exchange surface. Answer: Large surface area; thin/short diffusion distance; moist (for gases to dissolve); good blood supply / ventilation. Marking: 3 features (3).

Q83 · Structured · Digestion

Explain why food is digested into small molecules. Answer: Large insoluble molecules (starch/protein/fat) cannot cross membranes; enzymes break them into small soluble molecules (glucose/aa/fatty acids) for absorption. Marking: size/solubility (1-2).

Q84 · Structured · Nephron function

Describe ultrafiltration and selective reabsorption briefly. Answer: Ultrafiltration: blood pressured through glomerular capillary → filtrate (water, glucose, ions, urea) into Bowman's capsule. Selective reabsorption: useful substances (glucose, some ions, water) reabsorbed in tubule back to blood. Marking: filtration (1); reabsorption (1-2).

Q85 · Structured · Reflex arc

List the pathway of a reflex (knee jerk). Answer: Stimulus → receptor → sensory neuron → spinal cord (relay neuron) → motor neuron → effector (muscle) → response. Bypasses brain for speed. Marking: pathway (2-3); brain bypass (1).

Q86 · Structured · Hormone feedback

Explain negative feedback in blood glucose control. Answer: High glucose → pancreas releases insulin → cells take up glucose → glucose falls → insulin secretion drops. Low glucose → glucagon released → liver releases glucose → rises. Negative feedback maintains set point. Marking: high→insulin (1); low→glucagon (1); feedback loop (1).

Q87 · Structured · Xylem/phloem

Contrast xylem and phloem transport. Answer: Xylem: dead cells, one-way (roots→leaves), water+minerals, passive (transpiration pull). Phloem: living, two-way, sugars (source→sink), active (translocation). Marking: 3 contrasts (3).

Q88 · Structured · Genetic cross

In humans, free earlobe (E) dominant over attached (e). Homozygous free × attached. Offspring phenotype? Answer: EE × ee → all Ee → 100% free earlobes. Marking: cross (1); phenotype (1).

Q89 · Structured · DNA → protein (outline)

Outline transcription and translation. Answer: Transcription: DNA → mRNA in nucleus. Translation: mRNA to ribosome; tRNA brings amino acids; codon sequence → polypeptide. Marking: transcription (1); translation (1-2).

Q90 · Structured · Ecosystem energy

Why is energy transfer between trophic levels only ~10% efficient? Answer: Much energy lost as heat (respiration), undigested matter, and not all biomass consumed; only ~10% stored as new biomass. Marking: heat loss (1); incomplete consumption (1).

Q91 · Structured · Adaptation

Give one structural adaptation of a desert plant and its function. Answer: e.g. thick cuticle / reduced leaves (spines) → reduces transpiration/water loss; deep roots → access water. Marking: adaptation (1); function (1).

Q92 · Structured · Biodiversity

State two human activities that reduce biodiversity and one conservation method. Answer: Activities: deforestation, pollution, overfishing. Conservation: protected reserves, legislation, sustainable use. Marking: 2 activities (1-2); 1 method (1).

Q93 · Structured · Disease

Distinguish a bacterial disease from a viral disease (one example each). Answer: Bacterial (e.g. tuberculosis) can be treated with antibiotics; viral (e.g. influenza) requires immune response/antivirals, antibiotics ineffective. Marking: bacterial+example (1); viral+example (1).

Q94 · Structured · Immune

Describe how vaccination confers immunity. Answer: Introduces weakened/dead pathogen → immune system produces antibodies & memory cells → faster stronger response on real exposure. Marking: antigen exposure (1); memory (1-2).

Q95 · Structured · Mitosis vs meiosis

State two differences. Answer: Mitosis: 1 division, 2 diploid identical cells (growth/repair). Meiosis: 2 divisions, 4 haploid genetically varied gametes (reproduction). Marking: 2 differences (2).

Q96 · Structured · Enzyme inhibition concept

What is a competitive inhibitor? Answer: A molecule similar to substrate that binds the active site, blocking substrate; effect reduced by higher substrate concentration. Marking: binding site (1); reversible by [S] (1).

Q97 · Structured · Transpiration factors

Name two environmental factors that increase transpiration rate. Answer: Higher temperature, lower humidity, increased wind, higher light (stomata open). Any two. Marking: 2 factors (2).

Q98 · Structured · Population growth

Describe an S-shaped (logistic) growth curve. Answer: Slow start (lag), rapid increase (exponential), then levels off at carrying capacity (K) as resources limit. Marking: 3 phases (3).

Q99 · Structured · Biotechnology

Give one use of genetic engineering in medicine. Answer: e.g. Bacteria engineered to produce human insulin (recombinant DNA) → treatment for diabetes. Marking: example + application (1-2).

Q100 · Structured · Classification

State the hierarchy (Kingdom → Species) for humans briefly. Answer: Animalia → Chordata → Mammalia → Primates → Hominidae → Homo sapiens. (Domain Eukarya.) Marking: correct sequence (2-3).

Q101 · Data Response · Enzyme graph

Graph: enzyme activity peaks at 40°C then drops sharply by 60°C. Explain. Answer: 40°C = optimum; above, thermal denaturation disrupts tertiary structure/active site → irreversible loss of activity. Marking: optimum (1); denaturation (1-2).

Q102 · Structured · Leaf adaptation

State three leaf adaptations for photosynthesis. Answer: Broad flat → large surface area; thin → short diffusion path; stomata → gas exchange; chloroplasts → light capture; transparent epidermis → light to mesophyll. Marking: 3 (3).

Q103 · Structured · Blood clotting concept

Name the role of platelets in wound healing. Answer: Platelets aggregate at wound, release clotting factors → fibrin mesh forms → traps cells → scab. Marking: aggregate + fibrin (1-2).

Q104 · Structured · Nitrogen cycle (concept)

State one role of decomposers in ecosystems. Answer: Break down dead organisms → release mineral ions (e.g. nitrates) back to soil → reused by plants. Marking: recycling nutrients (1-2).

Q105 · Structured · Vision (concept)

Accommodation: to focus on a near object, the lens becomes ___ (thicker/thinner). Answer: thicker (more curved) to bend light more. Marking: thicker for near (1-2).

Q106 · Structured · Speciation (concept)

How can isolation lead to new species? Answer: Geographic isolation prevents interbreeding → different selection pressures → genetic divergence → reproductive isolation → new species. Marking: isolation → divergence → new species (2-3).

Q107 · Structured · Drug concept

State one effect of a depressant (e.g. alcohol) on the nervous system. Answer: Slows nerve impulses / reaction time / impairs coordination (acts on synapse). Marking: effect (1-2).

Q108 · Structured · Plant hormone

Auxin promotes ___ elongation on the shaded side causing phototropism. Answer: cell elongation → shoot bends toward light. Marking: auxin + elongation (1-2).

Q109 · Structured · Sustainability

Define sustainable use of resources. Answer: Using resources at a rate that meets present needs without compromising future generations' ability to meet theirs. Marking: intergenerational definition (1-2).

Q110 · Essay-style · Homeostasis

Evaluate the importance of negative feedback in maintaining a stable internal environment (2 systems). Answer: Negative feedback keeps variables (temperature, glucose, pH, water) near set points. Examples: (1) thermoregulation (sweating/shivering); (2) blood glucose (insulin/glucagon). Importance: enzymes & cells function only in narrow ranges; failure → disease. Limitation: slow if extreme change; requires functioning receptors/effectors. Marking: definition (1); 2 systems (2); importance (1-2); limitation (1).

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物质运输（Q6–Q12）与遗传（Q68–Q73）是常错点。主观题交 英文答题批改指令 按 HKEAA 标准阅卷。