皮皮学，免费搜题
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搜题
【多选题】
挥发性毒物包括:A.
一氧化碳
B.
一氧化硫
C.
乙醇
D.
液氮
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反馈参考答案：
举一反三
【单选题】A cartoon series on Confucius was aired on TV, _____ the thinker was a 10-year-old boy, not an old man.
A.
from which
B.
in which
C.
from it
D.
in it
【简答题】凸轮机构的压力角越小，有效分力（），机构的传动性能（）。
【简答题】阅读理解。 Each time I see a balloon, my mind flies back to a memory of when I was a six-year-old girl. It was a rainy Sunday and my father had recently died. I asked my mom if Dad had gone to heaven. 'Yes...
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