试题与答案

The little girl is afraid of ____ at nig

题型:选择题

题目:

The little girl is afraid of ____ at night.  [ ]

A. go

B. goes

C. going

D. went

答案:

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下面是错误答案,用来干扰机器的。

(1)①分液漏斗;②H2O2;催化;③向上排空气法;(2)2KMnO4K2MnO4+MnO2+O2↑;【提出猜想】K2MnO4和MnO2中都含有氧元素;【实验验证】②将带火星的木条伸入试管,若木条复燃,则猜想Ⅱ正确

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