题目

The thief tried to run away from the market,but he ________getting caught by the brave people. A.got up  B.went up C.turned up  D.ended up 答案:D [句意:小偷试图从市场逃走,但最后被勇敢的人们抓住了。end up doing sth“最后以做某事而结束”。]某DNA分子共有含氮碱基1400个,其中一条链上(A+T)/(C+G)=3:4。问该DNA分子连续复制两次共需游离的胸腺嘧啶脱氧核苷酸的数目是(    ) A. 800个    B. 600个    C. 900个   D. 1200个
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