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【单选题】
电位滴定曲线指A.
A-λ
B.
A-c
C.
E-V
D.
I-V
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举一反三
【单选题】We should try not to use plastic bags,because they will____pollution for our soil.
A.
expect
B.
affect
C.
cause
【单选题】— We really shouldn’t use plastic bags any more when shopping. — It’s important to protect our environment.
A.
So does it.
B.
With pleasure.
C.
That’s OK.
D.
So it is.
【单选题】Don't use plastic bags when you go ______.
A.
shopping
B.
to shop
C.
shop
D.
the shop
【单选题】______ you use plastic bags, you mustn’t throw them about.
A.
After
B.
When
C.
While
D.
Before
【多选题】find environmental behavior 1.use plastic bags 2.use cloth bags 3.ride bicycle 4.plant trees 5. use disposable dinnerware 6. sort refuse 7.use public transport 8.protect wildlife
A.
use cloth bags
B.
ride bicycle
C.
plant trees
D.
sort refuse
E.
use public transport
F.
protect wildlife
【简答题】登高作业安全用具的实验主要是拉力试验，实验周期是一年。()
【单选题】You mustn't _______ them everywhere _______ you use plastic bags. [ ]
A.
fall; until
B.
fall; before
C.
drop; while
D.
drop; after
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