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搜题
【单选题】
四环素类抗生素不稳定的主要原因在于 ( )A.
A环的酚羟基
B.
环的烯醇基
C.
环的酮基
D.
6-位羟基
E.
5-位羟基
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】standardization ________
【多选题】Swaminathan identifies several different approaches to standardization:
A.
Part standardization
B.
Process standardization
C.
Product standardization.
D.
Procurement standardization
【单选题】Most people hold the view that the key to keeping fit is to ______ regularly．
A.
give out
B.
turn out
C.
work out
D.
get out
【简答题】率的标准化(standardization method)
【单选题】According to the writer of the article, the two words 'harmonization' and 'standardization'______.
A.
often refer to the same thing
B.
are rather different in that they originated from different sources
C.
always mean the same thing
D.
occasionally refer to the same thing
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