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【单选题】
HPIC与GC比较可忽略纵向扩散项,其主要原因是: A.系统压力较高A.
流速比GC的快
B.
流动相的黏度大
C.
柱温低
D.
:C
E.
r>2、在反合相色谱法中固定相与流动相的极性关系是:
F.
固定相的极性>流动相的极性
G.
固定相的极性
H.
固定相的极性=流动相的极性
I.
不一定,视组分性质而定
J.
:B K. r>3、在反合相色谱法中,流动相常用: L. 甲醇-水
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【简答题】尽管困难重重,一些女性还是在商场上获得了成功。 (odds)
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A.
活动单元格右移
B.
活动单元格下移
C.
右侧单元格左移
D.
下方单元格上移
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【单选题】若要删除表格中的B1单元格，而使原C1单元格变为B1单元格，应在“删除”对话框中选择( )选项。
A.
活动单元格右移
B.
活动单元格下移
C.
下方单元格上移
D.
右侧单元格左移
【单选题】听力原文：M: I went out with my girlfriend to a nice restaurant last night and I noticed that many people shouted for the bill. It was quite annoying and dislikable. W: (19) That seems to be very common am...
A.
Annoying and dislikable.
B.
Annoying but common.
C.
Common and acceptable.
D.
Impolite but common.
【单选题】听力原文：M: I went out with my girlfriend to a nice restaurant last night and I noticed that many people shouted for the bill. It was quite annoying and dislikable. W: That seems to be very common among p...
A.
Impolite but common.
B.
Annoying but common.
C.
Annoying and dislikable.
D.
Common and acceptable.
【单选题】听力原文：M: I went out with my girlfriend to a nice restaurant last night and I noticed that many people shouted for the bill. It was quite annoying and dislikable. W: That seems to be very common among p...
A.
Impolite but common.
B.
Annoying but common.
C.
Annoying and dislikable.
D.
Common and acceptable.
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