【英语阅读题5小题第31题Theseahasalwaysinterestedman.Fromithecangetfood,minerals,andtreasure.Forthousandsofyears,hecouldsailonit.Buthecouldnotgofarbeneathitssurface.Manwantstoexploredeepintothesea.However,hei】

　　英语阅读题5小题

　　第31题

　　Theseahasalwaysinterestedman.Fromithecangetfood,minerals,andtreasure.Forthousandsofyears,hecouldsailonit.Buthecouldnotgofarbeneathitssurface.

　　Manwantstoexploredeepintothesea.However,heisnotafish.Becausehemustbreatheair,hecannotstayunderthewater’ssurfaceforanylengthoftime.Toexploredeepwater,manfacesevenmoredangersandproblems.

　　Adiverwhowantstostayunderwaterformorethanafewminutesmustbreatheairoraspecialmixtureofgases.Hecanwearadivingsuitandhaveairpumpedtohimfromabove.Hecancarryatankofaironitsbackandbreathethroughahoseandamouthpiece.

　　Waterweighs800timesasmuchasair.Tonsofwaterpushesagainstadiverdeepinthesea.Hisbodyisundergreatpressure.

　　Whenadiverisundergreatpressure,hisbloodtakesinsomeofgaseshebreathes.Asherisestosurface,thewaterpressurebecomesless.Ifthediverrisestooquickly,thegasesinhisbloodformbubbles.Thediveristhensufferingfromthebends(潜水员病).Thebendscancauseadivertodoubleupinpain.Theycanevenkillhim.

　　1.Onthewhole,thispassageisabout_______.

　　A、specialmixtureofgasesindeepsea

　　B、theproblemsmanfacesindeep-seadiving

　　C、airpressureunderthesurfaceofseawater

　　D、akindofillnessthatmansuffersinthesea

　　2．Adiver’sbodyindeepwater_______.

　　A、isundergreatpressure

　　B、isjustlikethatofafish

　　C、suffersfromthebends

　　D、weighsverylittle

　　3．Thepassagedoesnotsay,butitmakesyouthinkthat_______.

　　A、deep-seadiversshouldbeingoodhealth

　　B、diversexplorethedeepseaonlyfortreasure

　　C、divingunderwatertooquicklycausesakindofillness

　　D、thereisaspecialmixtureofgasesunderthesea

　　4．Whydoesadivergetthebends?

　　A、Hetriestodoexercisesunderthewater.

　　B、Hisdivingsuitweighstoomuch.

　　C、Hecomestothesurfacetooquickly.

　　D、Theairinhisbloodisusedup.

　　5．Fromthepassagewecanseethat_______.

　　A、theseabegantointerestmaninthelastfewyears

　　B、manisnotathomedeepinthesea