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【判断题】
传染病发生后，实行封锁的范围越小越好A.
正确
B.
错误
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知识点：
皮皮学刷刷变学霸
举一反三
【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...
【简答题】The professor said, " Light travels much faster than sound." The professor said that light __________ much faster than sound.
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