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【多选题】
固定床 催化剂更换情况A.
催化剂不易磨损
B.
更换时必须停产
C.
失活催化剂可迅速再生
D.
对催化剂使用寿命要求高
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【单选题】听力原文：M：I just wonder whether it's advisable to spend so much time polishing my application letter. W: You had better do it, for it's worthwhile to make the effort. You know just how important it is to...
A.
The man should spend time polishing his furniture.
B.
The man should leave her a good impression.
C.
The man should make the effort to impress her.
D.
The man should spend time on his application letter.
【简答题】在个体发展中，婴儿时期的主导活动是（），幼儿期的主导活动（），进入小学后儿童的主导活动是（），成年后是以（）为主导活动。
【单选题】In a collision, the whole procedure of airbag's inflation and deflation takes nearly ( ).
A.
0.1second
B.
1minute
C.
1 sencond
D.
0.1 minute
【单选题】What does the passage mainly discuss?
A.
Inflation.
B.
Deflation.
C.
How to define inflation and deflation.
D.
How inflation and deflation cause changes in income distribution.
【单选题】Debt deflation is the _____ in aggregate _____ caused by deflation.
A.
increase; supply
B.
reduction; supply
C.
increase; demand
D.
reduction; demand
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