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ASVAB 考试速记表(2026)

免费、可打印的 ASVAB 考试速记表:128 个最高频要点,按考试的内容领域分成 8 个板块,每个板块标注其公布权重。

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  • 最近更新:2026 年 9 月。
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Arithmetic Reasoning

占考试 14%
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Identify the unknown
Restate what the question asks in your own words before touching the numbers so you solve for the right quantity.
Match keywords to operations
Words like total and combined signal addition, difference signals subtraction, of often signals multiplication, and per signals division.
Track your units
Carry units such as miles, dollars, or hours through the work; the units of your answer should match what the question asks for.
Watch for extra information
Some problems include numbers you do not need, so select only the values relevant to the question.
Convert percent to decimal
Divide a percent by 100 to get a decimal, so 8% becomes 0.08 before you multiply.
Find a percent of a number
Multiply the whole by the decimal form of the percent; 25% of 240 is 0.25 times 240, or 60.
Convert fractions to decimals
Divide the numerator by the denominator, so 3/4 equals 0.75.
Increase or decrease by a percent
For a 15% discount multiply by 0.85; for an 8% tax multiply by 1.08.
Write a ratio in lowest terms
Reduce a ratio the same way you reduce a fraction to compare quantities clearly.
Set up a proportion
Place matching quantities in the same position across an equals sign, then cross-multiply to solve for the unknown.
Use unit rates
Divide to find the cost or amount per single unit, which makes comparison and scaling straightforward.
Apply scale factors
Multiply every part of a ratio by the same factor so the relationship stays the same.
Compute an average
Add all the values and divide by how many there are; to find a missing value, multiply the average by the count to get the total first.
Use simple interest
Interest equals principal times rate times time, calculated only on the original amount.
Solve work and rate problems
Multiply rate by number of workers and by time to find total output, keeping units consistent.
Estimate to check
Round the numbers and estimate the answer to confirm your exact result is in a sensible range.

Word Knowledge

占考试 13%
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Look for most nearly means
The task is the closest match in meaning, not a perfect definition, so choose the best available option.
Use sentence context
When the word appears in a sentence, let the surrounding words guide which meaning applies.
Beware of multiple meanings
Many words have more than one meaning; pick the one that fits the way the word is used.
Eliminate opposites
Test writers often include an antonym as a trap, so rule out choices that mean the reverse.
Recognize common roots
Roots such as port meaning carry or spect meaning look appear in many words and hint at meaning.
Use prefixes
A prefix like un- or in- often reverses meaning, while re- suggests again and pre- suggests before.
Use suffixes
Endings such as -ful, -less, or -tion signal whether a word is describing, lacking, or naming something.
Combine the clues
Assemble the meanings of the parts to make a reasonable guess at the whole word.
Eliminate clearly wrong choices
Remove any option you are sure is unrelated to improve your odds among the rest.
Judge positive or negative tone
Decide whether the word feels positive or negative and match it to a choice with the same tone.
Think of the word in a sentence
Use the target word in a familiar phrase to sense its meaning before checking the options.
Never leave a blank
Because there is no wrong-answer penalty, always mark your best guess.
Read widely
Regular reading of articles and books exposes you to words in natural context.
Keep a word list
Write down unfamiliar words with their meanings and review them often.
Learn words in groups
Study related synonyms together so you can distinguish shades of meaning.
Use new words actively
Speaking and writing with new words cements them in memory for test day.

Paragraph Comprehension

占考试 12%
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Locate the topic sentence
The main idea often appears in the first or last sentence of a short passage.
Summarize in one sentence
Put the passage's point in your own words to confirm you understand it.
Distinguish main from supporting
Separate the central idea from the examples and details that back it up.
Ignore outside knowledge
Answer from the passage alone, even if you know more about the topic than it states.
Scan for keywords
Match important words from the question to the same words in the passage to find the relevant sentence.
Read the full sentence
Read around the keyword so you capture the complete meaning, not a fragment.
Match the restatement
The correct choice often paraphrases the passage rather than quoting it word for word.
Verify against the text
Confirm your choice by pointing to the exact place in the passage that supports it.
Stay close to the text
A correct inference follows directly from the stated information without a large leap.
Avoid overreaching
Reject choices that could be true in general but are not supported by the passage.
Watch signal words
Words such as because, therefore, and however show relationships that guide inferences.
Test each option
Ask whether the passage gives evidence for a choice before selecting it.
Identify the author's purpose
Decide whether the passage aims to inform, persuade, or explain.
Sense the tone
Notice word choice that reveals a positive, negative, or neutral attitude.
Recognize cause and effect
Track how one idea leads to another to follow the author's reasoning.
Manage your time
Read efficiently and answer from the passage so you keep pace across all questions.

Mathematics Knowledge

占考试 13%
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Follow order of operations
Evaluate parentheses, then exponents, then multiplication and division, then addition and subtraction.
Use exponents correctly
An exponent tells how many times to multiply the base by itself, so 3 cubed is 3 times 3 times 3.
Understand square roots
The square root of a number is the value that multiplied by itself gives that number.
Know factors and multiples
A factor divides a number evenly, while a multiple is the product of that number and a whole number.
Combine like terms
Add or subtract only terms that share the same variable, so 3x plus 2x equals 5x.
Isolate the variable
Perform the same inverse operation on both sides to get the variable alone.
Check by substitution
Put your solution back into the original equation to confirm it is correct.
Handle negative numbers
Track signs carefully, remembering that subtracting a negative is the same as adding.
Sum of triangle angles
The interior angles of any triangle always add up to 180 degrees.
Area of a triangle
Area equals one half times base times height, so remember the one-half factor.
Circle formulas
Circumference equals 2 times pi times the radius, and area equals pi times the radius squared.
Perimeter and volume
Perimeter is the distance around a shape, while volume of a cube is the edge length cubed.
Memorize core formulas
Know the common area, perimeter, and volume formulas cold so you can apply them quickly.
Substitute carefully
Replace each variable with its given value, keeping units and signs correct.
Rearrange when needed
Solve a formula for a different variable by applying inverse operations.
Estimate the result
Judge whether your computed answer is reasonable for the size of the shape or numbers involved.

General Science

占考试 13%
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Know cell parts
The nucleus stores genetic material, mitochondria release energy, and chloroplasts carry out photosynthesis in plants.
Understand body systems
The circulatory system pumps blood, the respiratory system handles breathing, and the digestive system processes food.
Learn basic genetics
A gene is a segment of DNA that carries inherited traits from parents to offspring.
Recognize blood components
White blood cells fight infection, red blood cells carry oxygen, and platelets help blood clot.
Know atomic structure
Protons carry positive charge and neutrons no charge in the nucleus, while electrons carry negative charge around it.
Read chemical formulas
Water is H2O, carbon dioxide is CO2, and table salt is NaCl.
Distinguish changes
A chemical change like rusting forms a new substance, while melting or boiling is a physical change.
Understand states of matter
Matter exists as solid, liquid, or gas, and changes state when energy is added or removed.
Define forces
Gravity pulls objects toward Earth's center, and friction opposes motion between surfaces.
Know energy types
Potential energy is stored by position or state, while kinetic energy is the energy of motion.
Understand energy conversion
Energy changes form, as when a stretched spring's potential energy becomes motion.
Recall temperature points
Pure water freezes at 0 degrees Celsius and boils at 100 degrees Celsius at sea level.
Know Earth's layers
The atmosphere is the surrounding gases, the lithosphere is the solid crust, and the hydrosphere is the water.
Order the planets
Mercury is closest to the Sun, followed by Venus, Earth, and Mars.
Understand the water cycle
Evaporation turns liquid water to vapor, and condensation turns vapor back to liquid.
Recognize measurement scales
The Richter scale measures earthquake magnitude, a common earth-science fact.

Electronics Information

占考试 12%
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Voltage in volts
Voltage is the electrical pressure that pushes current through a circuit, measured in volts.
Current in amperes
Current is the flow of electric charge, measured in amperes, often called amps.
Resistance in ohms
Resistance opposes the flow of current and is measured in ohms.
Power in watts
Electrical power is the rate of energy use, measured in watts and equal to voltage times current.
State Ohm's law
Voltage equals current times resistance, written as V equals I times R.
Solve for current
Rearrange to current equals voltage divided by resistance to find current.
Calculate power
Power equals voltage times current, giving the watts a device uses.
Apply the formulas
Substitute the known values, such as 12 volts and 4 ohms, to find the missing quantity like 3 amperes.
Add series resistances
In a series circuit, resistances add directly, so two 10-ohm resistors total 20 ohms.
Understand parallel circuits
In a parallel circuit, the total resistance is less than the smallest single resistor.
Identify components
A resistor limits current, a capacitor stores charge, and a diode allows current in only one direction.
Know protective devices
A fuse breaks the circuit when current gets too high to prevent damage.
Recognize good conductors
Copper is an excellent conductor and is widely used in wiring.
Recognize insulators
Rubber, glass, and plastic resist current and protect against shock.
Understand AC and DC
Alternating current reverses direction periodically, while direct current flows steadily one way.
Know the transformer's role
A transformer steps AC voltage up or down for efficient power transfer.

Mechanical Comprehension

占考试 12%
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Balanced forces
Equal and opposite forces cancel out, so an object stays still or keeps a constant motion.
Unbalanced forces
A net force in one direction causes an object to accelerate that way.
Friction opposes motion
Friction acts between surfaces sliding against each other and resists their movement.
Gravity acts downward
Gravity pulls objects toward Earth's center and gives them weight.
Levers multiply force
A lever pivots on a fulcrum to increase the force applied to a load.
Wheel and axle
A doorknob or steering wheel turns a small axle with a larger wheel for more turning force.
Pulleys change direction
A fixed pulley lets you pull down to lift a load up, and added pulleys reduce effort.
Inclined planes and wedges
A ramp is an inclined plane, and a wedge is a moving inclined plane that splits objects.
Increase mechanical advantage
A longer effort arm on a lever multiplies force more, easing the lifting of heavy loads.
Gear direction
Two meshed gears turn in opposite directions.
Gear speed trade-off
A small gear driving a large gear turns the large one more slowly but with more torque.
Fulcrum placement
Placing the fulcrum closer to the load increases a lever's mechanical advantage.
Gravitational potential energy
An object stores more potential energy the higher it is raised.
Elastic potential energy
A compressed or stretched spring stores energy that becomes motion when released.
Air pressure and altitude
Air pressure is greatest at sea level and decreases with altitude.
Energy conservation
Energy is not lost but changes form, such as potential energy converting to kinetic energy.

Auto and Shop Information

占考试 11%
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Crankshaft converts motion
The crankshaft turns the pistons' up-and-down motion into rotating motion that drives the wheels.
Spark plug ignites fuel
The spark plug produces a spark that ignites the compressed fuel-air mixture in the cylinder.
Four-stroke cycle
The cycle runs intake, compression, power, then exhaust, with the power stroke following compression.
Camshaft controls valves
The camshaft opens and closes the intake and exhaust valves at the right times.
Cooling system
The radiator circulates coolant and releases heat to keep the engine from overheating.
Electrical system
The battery stores energy to start the engine, and the alternator recharges it while running.
Braking system
Brakes use friction, usually pads on discs, to slow and stop the vehicle.
Transmission
The transmission uses gears to transfer engine power to the wheels and match speed to conditions.
Screwdrivers
A Phillips screwdriver fits a cross-shaped head, while a flat-blade fits a single straight slot.
Wrenches and torque
A torque wrench tightens bolts to a specific, measured tightness to avoid damage.
Measuring tools
A feeler gauge measures small gaps like a spark plug gap, and a level checks for horizontal.
Striking and cutting tools
A hammer drives nails, and a hacksaw with its fine-toothed blade cuts metal.
Use the correct tool
Matching the right tool to the task, such as a hammer for nails, prevents damage and injury.
Understand fasteners
Bolts, nuts, and screws hold parts together and require the proper driver or wrench.
Maintain fluids
Engine oil lubricates moving parts, reducing friction, wear, and heat.
Follow safety habits
Keeping a clean workspace and wearing protection reduces the risk of accidents.

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