【单选题】
______you choose, make sure that it is a good one. ___
A. What
B. Wherever
C. Whichever
D. Which
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答案
C
解析
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如图所示,a、b、c为内径相同的玻璃毛细管。a中水柱升高至h,b中间有扩大部分,d为内径相同的石蜡毛细管(水不润湿石蜡),则下列叙述不正确的是___
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双分子反应一定是基元反应
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【填空题】
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