【名词&注释】
高锰酸钾(potassium permanganate)、矿泉水(mineral water)、可选择(selectable)、中国高速铁路
[单选题]下列物质中属于氧化物的是
A. 高锰酸钾
B. 臭氧（O3）
C. 干冰
D. 矿泉水
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点击获取本科目所有试题
举一反三：
[单选题]17．
A. I
B. my
C. her
D. his
[单选题]28． Many children don't eat breakfast because________
A. their parents don-t give a good example to them
B. they don't like breakfast
C. they have no time in the morning
D. they don't like milk or eggs
[单选题]对本文的说明对象理解正确的一项是( )(3分)
A. 中国高铁列车
B. 中国高速铁路是怎样建起来的
C. 中国高铁的特点
D. 中国高铁列车“飞”起来的原因
[单选题]20．A see
A. ask
B. find
C. tell
[单选题]25． What is the best title for this passage?
A. Health．
B. Weather and Health．
C. Weather．
D. The Great Influence of Weather,
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