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【单选题】
What was the man's response to Clara’s gift?A.
He accepted happily.
B.
He accepted unexpectedly.
C.
He responded in a polite way.
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举一反三
【简答题】According to the author, how can companies be ethical in business?
【简答题】征收土地的，按照被征收土地的原用途给予补偿，征收耕地的补偿费用包括哪些?
【简答题】以下哪种推荐最为靠谱：
【单选题】Why do drug companies make no effort on the study of RAS?
A.
Because they can't find how medicine can take effect on RAS.
B.
Because RAS is often mutated and changes forms.
C.
Because it doesn't seem to be of vital importance on treating cancers.
D.
Because RAS binds firmly with cells and are inseparable.
【多选题】下列有关坍落度的叙述,( )正确。
A.
坍落度是表示塑性混凝土拌合物流动性的指标
B.
干硬性混凝土拌合物的坍落度小于 10 mm ，且需用维勃度（ s ）表示其稠度
C.
泵送混凝土拌合物的坍落度不低于 100 mm
D.
在浇筑板、梁和大型及中型截面的柱子时，混凝土拌合物的坍落度宜选用 70~90 mm
E.
坍落度越大，该混凝土的和易性越好
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