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【单选题】
下列不属于非镇静性抗组胺药的是( )A.
. 氯苯那敏
B.
氯雷他啶
C.
西替利嗪
D.
氯马斯汀
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皮皮学刷刷变学霸
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【简答题】分配系数 K 是固定相和流动相中的溶质 之比。待分离组分的 K 值越大,则保留值 。各组分的 K 值相差越大,则它们 分离。
【简答题】待分离的组分的分配系数K值越大,则它在色谱柱中停留的时间 ,其保留值越大。各组分的K值相差越大,则它们越 分离。
【单选题】The professor said he could talk on _____ interested the audience.
A.
any topic
B.
which topic
C.
whichever topic
D.
the topic he thought it
【简答题】分配系数K是固定相和流动相中的溶质浓度之比。待分离组分的K值越大,则保留值 ,各组分的K值 越大,则它们 分离。
【单选题】The professor said he wouldn’t attend the opening ceremony ____.
A.
unless was invited
B.
until inviting
C.
without inviting
D.
if not invited
【单选题】He wasn’t to understand what the professor said.
A.
as quick
B.
quick as
C.
quick enough
【简答题】Seeing that Jenny has bought the books for the biology class, Harrison says nobody does much on (1) because it’s still add-drop, which means students are (2) from class to class to find out which is b...
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