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【单选题】
下列指标属于结构相对数的是A.
资金利润率
B.
2013年我国钢产量为美国的58.6%。
C.
工人出勤率
D.
2013年国民生产总值为2012年的103.9%
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【单选题】液力偶合器也叫液力联轴器。它用在电动机与减速器之间，是应用动液传递能量的一种传动装置。主要由（）主要部件组成。
A.
主动轴
B.
涡轮
C.
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D.
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E.
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A.
approved
B.
accused
C.
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D.
warned
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A.
so could I
B.
nor could I
C.
so can I
D.
nor I could
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