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【单选题】
毛细管电泳是在传统电泳分析之上发展起来的，但其采用了______两项突破性改进。A.
细径毛细管和高电压；
B.
细径毛细管和高灵敏检测器；
C.
高电压和电动进样；
D.
电动进样和快速散热装置。
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【单选题】Some guests prefer to ______ their guest folios, go to their homes, and later receive a certain invoice.
A.
draw
B.
imprint
C.
copy
D.
sign
【简答题】营销组合决策包括了____、价格、分销、促销。
【单选题】She wanted to serve some coffee to her guests however, _________.
A.
she hadn't many sugar
B.
there was not a great amount of the sugar
C.
she did not have much sugar
D.
she was lacking in amount of the Sugar.
【单选题】Some house plants grow better if placed near a window with plenty of sunlight ______ others prefer to be in a more shaded spot.
A.
unless
B.
since
C.
when
D.
while
【简答题】Unsatisfied about their dormitory conditions on the campus, some college students prefer to live off campus. This has caused concern of the authorities. What is your opinion about the matter? Write an...
【单选题】Some professors prefer to control discussion while others prefer to guide the class without______ it.
A.
enforcing
B.
dominating
C.
enhancing
D.
disposing
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