《礼记·大传》载：“人道亲亲也，亲亲故尊祖，尊祖故敬宗，敬宗故收族，收族故宗庙严，宗庙严故重社稷，重社稷故爱百姓。”材料旨在强调（    ）

下列加下划线字注音全都正确的一项是（    ）

聋哑人之间用手语交谈，要依靠

首字母填空
(1)His sister gets up at h ____ past six in the morning.
(2)Mr and Mrs Wang go to work by s____ every day.
(3)My home is about 5 k____ from our school.
(4)He always gets early ,he is n____  late for work.
(5)The classroom is too n____  , I can't hear you.

大多数生物的生长发育都是从一个细胞开始的，这个细胞就是（   ）