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问题
单项选择题
由于水的不断蒸发,空气中总会有部分水蒸汽,这种含有水蒸汽的空气称()。
A.热空气
B.饱和空气
C.湿空气
D.干空气
答案
参考答案:C
选择题
In my opinion, mathematics _____fun, but more than 80% of the group _____agree with me.
A.are; don’t
B.isn’t; don’t
C.are; doesn’t
D.is; doesn’t
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选择题
I know there are many people there ______ speak English.
A. what
B. who
C. whose
D. where
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