题目

Read and choose.读一读,选出正确句子把对话补充完整。A. Who’s he? Zhang Peng?B. A boy or a girl?C. Morning, Mike.D. Yes. You are right.E. Is he Wu Yifan?Mike: Good morning, John.John: 【1】.Mike: John. I have a good friend. John: 【2】. Mike: A boy. He’s tall and thin.John: 【3】. Mike: No. He has glasses.John: 【4】.Mike: 【5】. 答案:【答案】【1】C【2】B【3】A【4】E【5】D【解析】【1】略【2】略【3】略【4】略【5】略已知某细胞在减数分裂时含有4个四分体,那么该细胞在四分体时期所含的脱氧核苷酸链是(      ) A、4条         B、8条      C、16条       D、32条
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