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【单选题】
发动机油的黏度是随温度变化的,温度升高,黏度( )
A.
变大
B.
变小
C.
不变
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A.
If
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A.
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B.
血红蛋白电泳分析
C.
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D.
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E.
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A.
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B.
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C.
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D.
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E.
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A.
He made all scientific work on it illegal.
B.
He has set up a panel of scientists and philosophers to ban it.
C.
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D.
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A.
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B.
竹蜻蜓
C.
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D.
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