体育锻炼对心理健康的积极影响（）A.有助于智力的发展和提高 B.有助于情感与情绪的调

用四舍五入法把0.00304保留两个有效数字所得到的近似值是______．

用括号内所给词的适当形式填空。

1.  Mr King_________(teach) us English last term.

2.  It _________(rain) outside. Please take this raincoat with you.

3.  Mr Zhang_________(add) that getting up carly was good for your health.

4.  Last week our teacher asked us to write some_________(essay) on pollution.

5.  I don't know the correct_________(pronounce) of the word.

6.  1 was very_________(impress) when I saw my little son carrying a lot of things for me.

该图表明二战后世界经济发展出现了

A．资本主义经济体系化、制度化

B．世界经济生产国际化、专业化

C．世界贸易体系规范化、法制化

D．世界经济区域集团化

儿童文学是专为（）创作并适合他们阅读的、具有独特（）和丰富价值的各类文学作品的总称。