Waterisveryimportantforlivingthings.Withoutwatertherecanbenolifeonearth.Allanimalsandplantsneedwater.Manalsoneedswater.

　　Waterisfoundatmosteverywhere.Eveninthedriestpartoftheworldthereissomewaterintheair.

　　Asweallhavefoundout,watermaybeasolid,oraliquidoragas.Whenitisasolid,itmaybeashardasbrick,Whenitisaliquid,youcanpouritoutofacontainer.Whenitisagas,youcannotseeorfeelit.

　　Althoughabout70percentoftheearth'ssurfaceiscoveredwithwater,therearemanyplacesintheworldstillrunningoutofwater.Soweshouldmakegooduseofwateronearth.

　　水

　　水对生物很重要,没有水,地球上就没有生命.所有的动植物都需要水.人类也需要水.

　　水几乎无处不在.即使在世界上最干燥的地方,空气中也有水.

　　水,正如你所了解的,有固态、液态和气态.当它是固态时,它可以像砖一样硬；当它是液态时,你可以将它从容器中倒出；当它是气态时,你看不见或感觉不到它.

　　虽然地球表面70％是水覆盖着,世界上仍有许多地方缺水.所以我们要好好利用地球上的水

　　答案补充

　　Waterisveryimportantforus.Wemustdrinkwatereveryday.Wecan’tlivewithoutwater.Wateriseverywherearoundus.Athome,weusewatertowashclothes,towashdishes,tocookrice,tocleantheflat,tohaveshowers,tomakedrinks,tocleanourteeth,tohaveabathandsoon.Atwork,peopleusewatertoputoutfires,togrowvegetables,tomakethingsinfactoriesandsoon.Wealsocanswiminthesea.Waterisimportantforus,isn’tit?

　　Overtheworldwaterresourceisbeingpollutedandover-exploited.InChina,waterisextremelyscarceduetoabigpopulation.Wehaveonlyonequarteroftheworldaveragewateravailabilitypercapita.Andtomakemattersworse,thewaterdistributionisquiteuneventhroughoutChinaandacrosstheyear.Pollutedwaterisoneofthebiggestproblemsintheworld.Wecannotlivewithoutthewater.Butthewaterwecandrinkisverylittle,pollutedwaterisveryserious,sowemustprotectthewater,protectourhome.