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> It’s necessary for human beings to breath _______ and plants can produce it.A.CO2B.H2C.O2D.N2-七年级英语
It’s necessary for human beings to breath _______ and plants can produce it.A.CO2B.H2C.O2D.N2-七年级英语
题目简介
It’s necessary for human beings to breath _______ and plants can produce it.A.CO2B.H2C.O2D.N2-七年级英语
题目详情
It’s necessary for human beings to breath _______ and plants can produce it.
A.CO2
B.H2
C.O2
D.N2
题型:单选题
难度:中档
来源:不详
答案
C
根据常识对于人类而言呼吸氧气是必要的,植物能产生氧气,故选C。A是二氧化碳,B是氢气,D是氮气。
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题目简介
It’s necessary for human beings to breath _______ and plants can produce it.A.CO2B.H2C.O2D.N2-七年级英语
题目详情
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