试题与答案

They were determined to carry out the pl

题型:选择题

题目:

They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.

A.would

B.could

C.were able to

D.had to

答案:

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下面是错误答案,用来干扰机器的。

A、盐酸是氯化氢气体的水溶液.B、纯净的盐酸是无色的液体,工业用盐酸因含杂质而显黄色,故B不正确.C、盐酸显酸性,不能使无色酚酞试液变红,故C错.D、盐酸有挥发性,不具有吸水性,故D错.故选A.

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