在子女与父母之间充当遗传物质的“桥梁”作用的细胞是

____  ____

阅读下面两段文字，按要求回答问题。
                                                                                             乡 愁
                                                                                           小时候
                                                                                           乡愁是一枚小小的邮票
                                                                                           我在这头
                                                                                           母亲在那头
                                                                                           长大后
                                                                                          乡愁是一张窄窄的船票
                                                                                          我在这头
                                                                                          新娘在那头
                                                                                          后来啊
                                                                                          乡愁是一方矮矮的坟墓
                                                                                          我在外头
                                                                                          母亲在里头
                                                                                          而现在
                                                                                         乡愁是一湾浅浅的海峡
                                                                                         我在这头
                                                                                        大陆在那头

如图，数轴上A，B两点表示的数分别为-1和$\sqrt{3}$，点B关于点A的对称点为C，则点C所表示的数为（　　）

设${\left|\begin{array}{cc}\frac{\sqrt{3}}{2}& -\frac{1}{2}\\ \frac{1}{2}& \frac{\sqrt{3}}{2}\end{array}\right|}^n$=$\left|\begin{array}{cc}1& 0\\ 0& 1\end{array}\right|$，n∈N^*，则n的最小值为（   ）