题目:
It is said that another new railway bridge ____ over the Changjiang River at present. |
A. has put up B. is to put up C. is being put up D. is going to be put up |
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:A项中的氯化铜溶液没有给出体积,且铜离子发生水解,所以铜离子数目不可计算,A错误;B项中标况下22.4L的Cl2为1mol,但是氯气参与的反应并不是氯气都做氧化剂变成-1价而转移2NA 电子,如氯气与...