单项选择题
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A.Being too hot.
B.Being delayed.
C.Catching the beach ball.
D.Getting up early.
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单项选择题
ADHland ADH2 are same brewers’’ yeasts responsible for breaking down ethanol.
A.Y
B.N
C.NG
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单项选择题
At present, a probable inducement for countries to initiate large-scale space ventures is ___________.
A.international cooperation
B.scientific research
C.nationalistic reasons
D.long-term profits
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