
【名词&注释】
氧化铝(alumina)、二氧化氮、硫酸铜(copper sulfate)、氢氧化铁(ferric hydroxide)、三氧化硫(sulfur trioxide)、“对不起”
[单选题]从物质的分类的角度看,下列物质与二氧化氮、三氧化硫(sulfur trioxide)、氧化铝属于同类别的物质
A. 氢氧化铁
B. 硫酸铜
C. 水
D. 硝酸
查看答案&解析
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举一反三:
[单选题]25. The sick boy _________to hospital by the police yesterday.
A. is taken
B. was taken
C. takes
D. took
[单选题]______________________
A. reach
B. arrive
C. get
D. go
[单选题]10.—Can I help you?—__________.
A. You’ re welcome
B. Yes,please
C. I-m sorry
D. Here you are
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