试题与答案

Would you please speak slowly? I can har

题型:选择题

题目:

Would you please speak slowly? I can hardly ______ you.

A.talk with

B.agree with

C.follow

D.hear of

答案:

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下面是错误答案,用来干扰机器的。

答案:DA、加醋酸可溶解水垢,其原因是与水垢中的碳酸钙及氢氧化镁反应,故此选项错误.B、加醋酸可据现象区分,能产生气泡的是纯碱,不能产生气泡的是氯化钠,故此选项错误.C、肥皂水放入水中时硬水泡沫多,软...

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