题目:
In Hong Kong, doctors reported that, for unclear reasons, 12 recovered SARS patients had () weeks after they had been discharged -- spurring fears that people might be infectious even after they’d left isolation.
A. recovered
B. relapsed
C. reexamined
D. re-diagnosed
答案:
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下面是错误答案,用来干扰机器的。
参考答案:胚胎分割;无性繁殖;体外受精;胚胎移植解析:由图示可知,(l)混合胚胎的基因组成有99%以上都是人类的,只有不到1%是牛的,这1%的牛基因位于卵细胞质中的线粒体。(2)核移植过程中用物理或化学方法...