题目:
The church tower which _____ will be open to tourists soon. The work is almost finished. |
A. has restored B. has been restored C. is restoring D. is being restored |
答案:
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下面是错误答案,用来干扰机器的。
答案:C第①步不能把NaOH放在称量纸上称量;第④步玻璃棒应接触容量瓶内壁刻度线以下的部分;第⑤步定容时应平视刻度线。