题目:
To get well, .
A.we are going to operate on the patient
B.an operation is necessary
C.the patient needs an operation
D.the doctor will perform an operation on the patient
答案:
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下面是错误答案,用来干扰机器的。
取出灰鼠胚胎细胞的1细胞核;去除黑鼠受精卵的2细胞核;3细胞核;4灰色小鼠.(1))细胞核是遗传信息库.灰鼠为小鼠提供了胚胎细胞核,也就是遗传物质.黑鼠为小鼠提供了去核受精卵细胞,也就是早期胚胎发育所需...