Don'tstayopenfaucet,peoplewalkawaytoremembertoturnoffthe tap.Washyourhandswithwater,trytoopenasmalldot,faceandbrushy ourteethcanusebasin.

3.Howtoprotect...

Havegoodhabit,convenientlyclosedwithoutfaucet,don'tlitte randreducefactorysewagedisposal.

P44

1.Whyis.....

Waterwhoisthefountainoflife.Nofood,wecanliveseveralweeks ,butnowater,wedie,webodytwo-thirdsiswater。

2.Howto.....

Don'tstayopenfaucet,peoplewalkawaytoremembertoturnoffthe tap.Washyourhandswithwater,trytoopenasmalldot,faceandbrushy ourteethcanusebasin.

3.Howtoprotect...

Havegoodhabit,convenientlyclosedwithoutfaucet,don'tlitte randreducefactorysewagedisposal.

历史P73

(2)

尼罗河定期泛滥--发达的农业---村落的形成---手工业....----尼罗河两岸的小国....---初步统一的古埃及国家----地跨...

历史P74：

二.1.

(1)图一，古埃及--象形文字，金字塔，太阳历

(2)图二，古印度---佛教，阿拉伯数字