非金属单质

【名词&注释】

氯化钾(potassium chloride)、氧化铜(copper oxide)、非金属单质

[填空题]非金属单质

查看答案&解析查看所有试题

学习资料：

[单选题]They waited and waited for something _________ to happen.

A. excite
B. excited
C. exciting
D. to excite

[单选题]15．

A. play
B. to play
C. plays
D. playing

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