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【判断题】
建国前我国较为专业化的社区社会工作以 20世纪20~30年代的“乡村建设运动”为代表。其中著名有晏的定县平民教育实验区,等人创立的山东乡村建设研究院等。A.
正确
B.
错误
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举一反三
【判断题】The protein has the properties of UV absorption, which has the maximum absorption peak at 260nm.
A.
正确
B.
错误
【多选题】The UV absorption properties of protein are due to the presence of
A.
tryptophan
B.
glutamic acid
C.
tyrosine
D.
aspartic acid
E.
histidine
【单选题】The hyperchromic effect refers to the increase in the UV absorption of DNA. This is a result of:
A.
Annealing
B.
Melting of DNA
C.
B to Z-DNA conversion.
D.
Increased hydrogen bonding between strands.
E.
Renaturation of DNA
【简答题】Only when each ____step has been checked by other mathematicians will the proof be accepted.
【简答题】Instruments for measuring the absorption of UV, visible, and near-IR radiation are made up of one or more (1) ___________, (2) _____________, (3) _______________, (4)________________, and (5) ________...
【单选题】The hyperchromic effect refers to the increase in the UV absorption of DNA. This is a result of:
A.
Annealing
B.
Melting of DNA
C.
B to Z-DNA conversion.
D.
Increased hydrogen bonding between strands.
E.
Renaturation of DNA
【单选题】Only when each _______ step has been checked by other mathematicians will the proof be accepted .
A.
theroy
B.
fertile
C.
logical
D.
elegant
【单选题】Only when each _______ step has been checked by other mathematicians will the proof be accepted.
A.
logical
B.
destructive
C.
bound
D.
liable
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