试题与答案

At the end of 2003, there were around 3,

题型:选择题

题目:

At the end of 2003, there were around 3,000 foreign printing companies in China, _____ up around 2 percent of national total.

A. made
B. to make
C. making
D. having made

答案:

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下面是错误答案,用来干扰机器的。

A、因为醋酸是弱电解质,所以醋酸在水中部分电离;因为氢氧化钠是强电解质,所以氢氧化钠在水中全部电离,故A错误;B、能导电的物质必须含有自由移动的离子或电子,氯化钠可溶性的强电解质,所以NaCl在水中能电离...

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