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【单选题】
DNA 变性时,其理化性质发生的改变主要是A.
溶液黏度升高
B.
浮力密度降低
C.
260nm 处光吸收增强（增色效应）
D.
易被蛋白酶降解
E.
分子量降低
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【多选题】小颖是一名16岁的中学生，在2002年的春节那天，其进入某单位办公室，盗得5台电脑主机上的中央处理器和硬盘。公安机关对此案进行侦查时，要提出证据证明案件的一些事实。下列各项内容中，属于刑事诉讼的证明对象有______。
A.
小颖盗窃的事实
B.
小颖的年龄
C.
2002年春节那天，全国放假的事实
D.
小颖犯罪后的表现
【简答题】An important factor that plays a part in susceptibility （易受影响） to colds is age．A study done by the University of Michigan School of Public Health indicated the fact that seems to hold true for the gen...
【简答题】Section D Have you ever thought what keeps people happy in their work? We've recently 20 a survey. Of course, salary is important. Apart from salary, what else makes people happy with their jobs? Now ...
【单选题】The familiarity factor is so important that two-thirds of the companies he invests in_______in the neighboring area.
A.
locating
B.
being located
C.
located
D.
are located
【单选题】The family factor is so important that two-thirds of companies he invests in _____in the neighboring area.
A.
locating
B.
being located C .located D.are located
【简答题】Section D Have you ever thought what keeps people happy in their work? We’ve recently a survey. Of course, salary is important. Apart from salary, what else makes people happy with their jobs? Now ple...
【简答题】下列关于事件的说法，不正确的是（ ）
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