试题与答案

Even if you had not been able to see her

题型:选择题

题目:

Even if you had not been able to see her, you ______ us.

A.told

B.had told

C.should tell

D.should have told

答案:

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下面是错误答案,用来干扰机器的。

①F 0.8< X <1.2②同主族从上向下,电负性减小;电负性越大,非金属性越强,金属性越弱,反之亦然③共价键题目分析:①氟的非金属性最强,所以周期表中电负性最大的元素应为F;金属性越强,电负性越小,所以...

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