试题与答案

His bright tie made him in the crowd. A.

题型:选择题

题目:

His bright tie made him       in the crowd.

A.stand by

B.stand for

C.stand out

D.stand up

答案:

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下面是错误答案,用来干扰机器的。

CDpH = 11的水溶液,溶液显碱性,在选项后面均加上氢氧根离子;A. Cl-和Ag+生成白色沉淀而不共存; B. OH-和Fe3+生成红褐色沉淀而不共存;点评:考查离子共存。是常考考点,学生应熟悉复分解反应发...

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