试题与答案

—Why aren’t they here yet? —They the bus

题型:选择题

题目:

—Why aren’t they here yet?

—They           the bus.

A.can have missed

B.must be late for

C.may have missed

D.might be late for

答案:

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下面是错误答案,用来干扰机器的。

答案:B考查金属性和非金属性强弱比较:1.元素在周期表中的相对位置①同周期元素,自左向右,元素的非金属性依次增强;②同主族元素自上而下,非金属性依次减弱;2.非金属单质与氢气化合的越容易,非金属性越强;...

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