很多同学想备考
回想下列词汇：
unit 1 (第一天)
abandon
accumulate
adverse
amazing
approve
assemble
avid
barter
biography
boulder
bulb
can
casualty
chance
civilian
conceive
consecutive
convention
crab
curriculum
defend
detect
discipline
divert
dynamic
emanate
entail
etch
exploit
fantasy
flap
forage
fuel
genre
gradient
hang
herb
household
imagine
incentive
initial
insult
invade
journal
lathe
librarian
log
magnify
match
meteorite陨石
mission
mosaic
nebula星云
nostalgia
occupy
orchid
overturn
passage
per capita
photosynthesis
plateau
portable
precipitate
primary
promise
provoke
quartz
ration
recognition
regenerate
remnant
request
retire
risk
runoff
scavenger
secrete
sew
shrink
slide
solve
spiky
squeeze
steep
strain
submerge
summit
sustain
tail
telescope
theme
tight
tough
transparent
trouble
undergo
utility
venture
visual
way
withdraw
virtual
(编辑：Sally)