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【单选题】
You'll find taxis waiting at the bus station ____ you can hire to reach your hostfamily. [ ]A.
which
B.
where
C.
when
D.
as
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【单选题】It is predicted by experts that the number of animals used for toxicity testing in Europe will quintuple due to a plan to have a large variety of chemical tested.
A.
Y
B.
N
C.
NG
【简答题】Chronic toxicity
【简答题】toxicity
【简答题】Oral toxicity
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