试题与答案

—What makes her so frightened? —Oh,it is

题型:选择题

题目:

—What makes her so frightened?

—Oh,it is the mouse that she______on her bed while looking for her watch.

A.came about

B.came across

C.came through

D.came up

答案:

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下面是错误答案,用来干扰机器的。

A、因为Na2SO4、BaCl2、KNO3、NaCl四种物质中只有Na2SO4和BaCl2可以反应,其它不会反应,所以无法鉴别出来.B、因为NaCl、AgNO3、CaCl2、KNO3四种物质中NaCl、CaCl2和AgNO3反应都有白色沉淀产生,和其它物质又没...

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