字典翻译 问答 小学 英语 【Somescientistssaythatanimalsintheoceanareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.Thenoisethataffectseacreaturescomesfromanumberofhumanactivities.Itiscausedmainlybyindustrialunderwaterexplos】
问题标题:
【Somescientistssaythatanimalsintheoceanareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.Thenoisethataffectseacreaturescomesfromanumberofhumanactivities.Itiscausedmainlybyindustrialunderwaterexplos】
问题描述:

Somescientistssaythatanimalsintheoceanareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.Thenoisethataffectseacreaturescomesfromanumberofhumanactivities.Itiscausedmainlybyindustrialunderwaterexplosions,oceandrilling,andshipengines.Suchnoisesareaddedtonaturalsounds.Thesesoundsincludethebreakingoficefields,underwaterearthquakes,andsoundsmadebyanimalsthemselves.
Decibels(分贝)measuredinwateraredifferentfromthosemeasuredonland.Anoiseofonehundredandtwentydecibelsonlandcausespaintohumanears.Inwater,adecibellevelofonehundredandninety-fivewouldhavethesameeffect.
Somescientistshaveproposedsettinganoiselimitofonehundredandtwentydecibelsinoceans.Theyhaveobservedthatnoisesatthatlevelcanfrightenandconfusewhales.
AteamofAmericanandCanadianscientistsdiscoveredthatloudnoisescanseriouslyinjuresomeanimals.Theresearchteamfoundthatpowerfulunderwaterexplosionswerecausingwhalesintheareatolosetheirhearing.Thisseriouslyaffectedthewhales’abilitytoexchangeinformationandfindtheirway.Someofthewhalesevendied.Theexplosionshadcausedtheirearstobleedandbecomeinfected.
Manyresearcherswhoseworkdependsonoceansoundsobjecttoalimitofonehundredandtwentydecibels.Theysaysuchalimitwouldmeananendtoimportantindustrialandscientificresearch.
Scientistsdonotknowhowmuchandwhatkindsofnoisesareharmfultooceananimals.However,manyscientistssuspectthatnoiseisagreaterdangerthantheybelieved.Theywanttopreventnoisesfromharmingcreaturesintheocean.
小题1:Accordingtothepassage,whichofthefollowingisincreasinglydangeroustoseacreatures?

A.Theman-madenoises.
B.Thenoisesmadebythemselves.
C.Thesoundofearthquakes.
D.Thesoundoftheice-breaking.
小题2:Astotheinfluenceofnoisesonwhales,whichofthefollowingstatementsistrue?A.Theyaredeaftonoises.B.Noisesatacertainlevelmayhurtthem.C.Theyareeasilyconfusedbynoises.D.Noiseswilllimittheira

孙崇峰回答:
  小题1:A小题2:C小题3:A小题4:C   
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