【名词&注释】
可燃性(flammability)、不定式(infinitive)
[单选题]下列关于氧气的说法中,错误的是
A. 氧气用于炼钢,目的是除去生铁中多余的碳和其他杂质
B. 氧气可以支持燃烧,说明氧气具有可燃性
C. 氧气可以供给呼吸,是因为和体内物质反应而释放能量,维持生命活动
D. 夏天鱼池内放增氧泵,是因为温度升高,氧气在水中溶解量减少
查看答案&解析查看所有试题
学习资料:
[单选题]Peter doesn’t like study. Maybe he ___________ .
A. plays too many computer games
B. has no pocket money
C. gets fatter and fatter
[单选题]3. When I came into the room,he pretended ________ his homework.
A. to do
B. be doing
C. doing
D. to be doing
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