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【单选题】
在液相色谱中,梯度洗脱适用于分离的是A.
异构体
B.
沸点相近，官能团相同的化合物
C.
沸点相差大的试样
D.
极性变化范围宽的试样
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【单选题】听力原文： The high court in Zimbabwe has been hearing a case in which senior government officials and the family of President Mugabe have been accused of corruption. The court heard allegations that large...
A.
the president's family
B.
the president's integrity
C.
officials' abuse of money
D.
officials' illegal mansions
【单选题】The reporters exposed the corruption of several senior officers in the government; consequently, these officers _________ to resign from office.
A.
have asked
B.
were asked
C.
had asked
D.
had been asked
【单选题】The president explained that the purpose of taxation was to_______government spending.
A.
finance
B.
expand
C.
enlarge
D.
budget
【单选题】If the government takes measures to enrich senior citizens’ social and spiritual life, it ____ help develop a truly harmonious society.
A.
Can
B.
must
C.
shall
D.
should
【单选题】如果 X 商品价格下降了,那么预算线将( )。
A.
以预算线与 Y 轴交点为轴向外逆时针移动
B.
向内平行移动
C.
以预算线与 X 轴交点为轴向外顺时针移动
D.
向外平行移动
【简答题】阅读下列对话，选择正确单词。 Word List: best, beautifully, hurts, too, loudly, either, softly, singer, know, hear Li Ming: Do you like karaoke? Liu Fang: Yes, I _________ a karaoke restaurant. Come on! Li Ming: Loo...
【简答题】The girl is softly. (dance)
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