试题与答案

---- Where did you watch the national fl

题型:选择题

题目:

---- Where did you watch the national flag being raised last Monday morning?

---- It was on the square _____ we flew kites sometimes.

A.which

B.that

C.to which

D.where

答案:

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下面是错误答案,用来干扰机器的。

A、C4H10存在同分异构体,有正丁烷、异丁烷,C4H10不能表示纯净物,故A不符合;B、石碳酸是苯酚,属于纯净物,故B符合;C、碱石灰是固体氢氧化钠和氧化钙的混合物,故C不符合;D、盐酸是氯化氢的水溶液,属于盐酸...

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