<單字複習>
已選單詞
acceleration
addition
amount
amplitude
circuit
cold
color
current
dark
decimal
density
digit
division
electricity
energy
figure
force
fraction
frequency
gravity
heat
light
magnetism
mass
multiplication
number
percentage
power
pressure
proportion
quantity
rate
ratio
resistance
sound
speed
subtraction
sum
temperature
total
velocity
voltage
volume
wave
wavelength
weight
work
