Theworldisnotonlyhungry,itwillalsobethirstyforwater.About97%ofwaterontheearthisseawater,orsalty(咸的)water.Mancanonlydrinkorusetheother3%ofthefreshwater(淡水)whichcomesfromrivers,lakesandunderground.T
Theworldisnotonlyhungry,itwillalsobethirstyforwater.About97%ofwaterontheearthisseawater,orsalty(咸的)water.Mancanonlydrinkorusetheother3%ofthefreshwater(淡水)whichcomesfromrivers,lakesandunderground.
Theseaisverybig.Lookatthemapoftheworld,thereismoreseathanland.Itcovers(覆盖)quartersoftheearth,itlooksverybeautifulwhenthesunisshinningonit.butitcanbeterriblewhenthereisastrongwind.
Somepartsoftheseaareverydeep.ThereisoneplacenearJapan.It'snearly11kilometershigh.Ifweputthatmountainintotheseaatthatplace,therewouldbe2kilometersofwateraboveit!
Theseaissalty.Thereisone"sea"calledtheDeadSea.TheDeadSeaisnotasea.It'sabiglakeintheJordanValley.It'sthesaltiest.It'snearthecityofJericho.It'sabout80.kilometreslong,between4.8and17.7kilometerswide.TheriverJordanrunsintotheDeadSea.Thesunisnotthereandthewaterissalty.Fishcan'tliveintheDeadSeaandplantscan'tgrownearit.Peoplecan'tswimwellintheDeadSea,buttheycan'tfloat(漂浮)onthewater.Thewaterisveryblueandtheairisclean.InwinterpeoplecometotheDeadSeatoenjoythesunshine.
46.Doesthefreshwatercomefromrivers,lakesandunderground?
A.Yes,itdoes.B.No,itdoesn't.C.Yes,itdoesn't.D.No,itdoes.
47.Thedeepestplaceintheseaisnear.
A.JapanB.IndiaC.AmericaD.China
48.Thepassagetellsustheseacoversoftheearth.
A.3%B.25%C.75%D.97%
49.TheDeadSeais.
A.80kilometerslongB.2kilometerswide
C.11kilometersdeepD.17.7kilometershigh
50.Accordingtothepassage,whichofthefollowingisn'ttrue?
A.TheriverJordanrunintotheDeadSea.
B.Theworldwillbethirstyforwater.
C.Thesealooksbeautifulwhenthesun-isshiningonit.
D.TheDeadSeaisthesaltiestseaintheworld.