题目内容

在高盐和低温条件下由DNA单链杂交形成的双螺旋表现出几乎完全的互补性，这一过程可看作是一个复性(退火)反应。

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[A] another
[B] others
[C] other
[D] anyone

C₀t_1/2与基因组大小相关。

DNA分子整体都具有强的电负性，因此没有极性。

Shop owners often hire moonlighting police as parking attendants so that shoppers
[A] can stay longer browsing in the store.
[B] won't have trouble parking their cars.
[C] won't have any worries about security.
[D] can find their cars easily after shopping.