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【单选题】
往复压缩机的最大压缩比是容积系数（ ）时的压缩比。A.
最大
B.
最小
C.
为零
D.
为1
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反馈参考答案：
举一反三
【简答题】He caught the thief with the collar and dragged him to the nearest police station.
【单选题】A.Because he looked very unhappy.B.Because he usually wore a hard wing collar.###
A.
Because he looked very unhappy.
B.
Because he usually wore a hard wing collar.
C.
Because the right side of his face was swollen.
D.
Because the left side of his face was swollen.
【简答题】He my collar and pulled me towards him.
【单选题】He was ________ after winning the competition.
A.
hot under the collar
B.
on cloud nine
C.
down in the dumps
D.
feeling blue
【简答题】A. Because he looked very unhappy. B. Because he usually wore a hard wing collar. C. Because the right side of his face was swollen. D. Because the left side of his face was swollen.
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