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【单选题】
与GC比较，HPLC可以忽略纵向扩散项，这主要是因为（）。A.
柱前压力高
B.
流速比GC快
C.
流动相的粘度大
D.
柱温低
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举一反三
【单选题】Why did Buck start to sleep in the forest?
A.
Because he didn’t like sleeping in the camp
B.
Because he was a wolf
C.
Because he heard the call of the wild again
D.
Because he saw a wolf
【简答题】Thousands were forced to move to cities search of job opportunities.( )
【单选题】Why didn’t Buck leave Thornton and go into the forest?
A.
Because of Thornton’s love
B.
Because Buck didn’t want to
C.
Because Buck wasn’t a wolf
D.
Because of Skeet and Blackie
【单选题】Why did Federal government sanction a few businesses to officially start selling names?
A.
The government wanted to make domain name game easier.
B.
The government thought reducing the cost of domain name is necessary
C.
The government realized protesting one's name is an important concept.
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