题目

I wonder ___ my brother is to get to Shanghai. A.when it is that                    B.what it is that C.when is it that                    D.what is it that 答案：A16．如图所示是某细胞进行增殖时可观察到的几个时期，用L～P表示，下面正确的叙述是（　　）①N期有8条染色体　　②P期紧接着L期③P期与M期细胞内DNA数量相等④M期一条染色体包括两条染色单体．A．①②③B．①④C．②③④D．①③