①减缓人口老龄化压力

②促进经济持续健康发展

③促进家庭幸福与社会和谐

④控制和减少老龄人口数量

已知集合A={﹣1，3，2m﹣1}，集合B={3，m}，若B⊆A，则实数m=____ ．

对号入座，给加横线的字选择正确的字义

观：   A.看  B.样子，景象   C.对食物的认识、看法

宏伟壮观____    走马观花____      乐观____     景观____

致：   A.给予  B.集中（精力、意志等）  C.引起，使达到  D.精密  E.情趣

景致____    学以致用____    精致____   致力____  致贺____

    As we know，there     1 four seasons in China . It's    2   in spring（春）, hot in   3    , cool in autumn(秋) and cold in    4   . My   5  season is winter. Sometimes it snows（下雪）. Everything is all white. The world    6   clean and fresh(新鲜). I can go skating then.
    But Kitty likes summer    7  than winter. She says summer is   8     for sports. She can go  9   ,  sometimes in a lake and sometimes in a river. She   10 it very much .