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【单选题】
聚丙烯酰胺凝胶制备时,聚合反应所使用的化学催化剂是( )。A.
TEMED
B.
SDS
C.
Tris
D.
过硫酸铵
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皮皮学刷刷变学霸
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【简答题】每季季末支付1000元,支付期5年。按月计息,5年末的本利和为57000元。则(1)月实际利率——。(2)季实际利率——。(3)年实际利率——。(4)年名义利率——。
【单选题】听力原文：W: I can't decide whether to take classes this summer or to find a summer job. M: I think you will learn more by working and you'll also make money for the next term. Q: What is the man's suggest...
A.
Finding a summer job.
B.
Taking the summer classes.
C.
Working and studying.
D.
Wait until later to decide.
【简答题】完形填空。 Big things were happening in my life the summer after I turned 13. In the middle of that summer , my parents 1 my entire world and turned it upside down 2 they told me they were getting a divorc...
【单选题】One of the results of Tambora eruption is that there was no summer in 116 throughout the whole world.
A.
Y
B.
N
C.
NG
【简答题】()和()离子含量高的水是硬水。
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