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【单选题】
在采用气相色谱法分析沸点较宽的试样时,为达到良好的分离分析效果,柱考虑时选用( )。A.
低温
B.
高温
C.
恒温
D.
程序升温
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皮皮学刷刷变学霸
举一反三
【单选题】My father promised that he ___ me a ten-speed bicycle as a present.
A.
bought for
B.
would buy
C.
had bought
D.
has bought
【简答题】My bicycle () a flat tire and I had to walk.
【单选题】日常生活中,有的人强于记忆,有的人强于思维,有的人擅长绘画,有的人擅长写作,有的人言语能力强,有的人空间能力占优势。这说明人的能力具有()。
A.
性别差异
B.
发展水平差异
C.
表现早晚差异
D.
结构差异
【简答题】At the time, I would go out in the evening with my parents. But this time I had borrowed a bicycle from a friend of mine. I didn’t know why, but once I was on my own bicycle, a kind of free feeling fl...
【单选题】When I came back, I found my bicycle __________.
A.
had gone
B.
has gone
C.
was gone
D.
is gone
【简答题】冷藏的草莓的编码是__________
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