皮皮学，免费搜题
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搜题
【单选题】
用电动吸引器吸痰时 , 每次吸痰的时间通常是
A.
5~8秒
B.
6~10秒
C.
10~20秒
D.
18~22秒
E.
25~30秒
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【简答题】阅读理解： Hard Work, Good Money We need: Staff (员工) to work in a busy operations center. You to be working in Hangzhou. We are: A rapidly expanding international IT company. Based in the UK and USA, with ...
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