酸菜、醋和酱油都是用传统发酵技术生产的．　

如果最简二次根式$\sqrt{3a-8}$与$\sqrt{7}$的被开方数相同，则a=____ ．

根据短文，选择正确答案。

    This is a picture of a family. The grandmother's name is Harry Smith. The grandfather's name is Jean Smith. They are very old. They are Americans.

    The father'sname is Lake Smith. He is 44. The mother's name is Kate Smith. She is 40. They have a son of ten and a daughter of fifteen.   

    The son's name is John Smith and the daughter's name is Mary Smith. They are students of No.12 Middle School. Kate is a teacher of the same school. Lake is a policeman. It's a very good family.

群众路线是党的生命线，也是人民政协的生命线。人民政协一头连着党政机关，一头连着群众。政协既要做好各界群众的“代言人”，又要当好党委、政府与群众的“连心桥”。这要求人民政协（    ）

①要拓宽渠道，搭建载体，执政为民

②进一步加强与各界群众的联系

③发挥其作为协商民主重要渠道的作用

④行使好决定国家重大事务的权力