分式方程$\frac{3}{2x}=\frac{1}{x-1}$的解为（　　）

阅读下面这首古诗，回答以下两题。
                                                                                                            夏 意（苏舜钦）
                                                                                                           别院深深夏席清，
                                                                                                           石榴开遍透窗明。
                                                                                                           树阴满地日当午，
                                                                                                           梦觉流莺时一声。
                                                                                             注：别院，即正院旁侧的小院。

地球半径约为6400000米，则此数用科学记数法表示为（   ）

关于细胞全能性的理解不确切的是（　　）