【名词&注释】
氯化钾(potassium chloride)、氧化铜(copper oxide)、非金属氧化物(nonmetal oxide)
[单选题]非金属氧化物
A. 盐酸
B. 氯化钾
C. 氧化铜
D. 淀粉
E. 五氧化二磷 F．氮气 G．氢氧化钙 H．甲烷
查看答案&解析
举一反三：
[单选题]30． Mr Henry didn’t exchange seats because
A. there was no man opposite to him
B. he had fallen asleep on the train ．
C. he hadn’t known he had been able to do so
D. somebody sat opposite to him
[单选题]19．
A. so
B. such
C. so a
D. such a
[单选题]9． This T-shirt is very old，________I like it very much．
A. because
B. or
C. but
D. and
[单选题]16．
A. not
B. very
C. /
本文链接：https://www.zhukaozhuanjia.com/download/5rqod4.html
