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Somescientistssaythatanimalsintheoceanareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.Thenoisethataffectsseacreaturescomesfromanumberofhu?manactivities.Itiscausedmainlybyindustrialunderwaterexpl
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问题描述:

 Somescientistssaythatanimalsintheoceanareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.

 Thenoisethataffectsseacreaturescomesfromanumberofhu?manactivities.Itiscausedmainlybyindustrialunderwaterexplo?sionsoceandrillingsandshipengines.Suchnoisesareaddedtonaturalsounds..Thesesoundsincludethebreakingoficefieldsunderwaterearthquakesandsoundsmadebyanimalsthemselves.

 Decibels(分贝)measuredinwateraredifferentfromthosemeasuredonland.Anoiseofonehundredandtwentydecibelsonlandcausespaintohumanears.Inwateradecibellevelofonehundredandninetyfivewouldhavethesameeffect.

 Somescientistshaveproposedsettinganoiselimitofonehundredandtwentydecibelsinoceans.Theyhaveobservedthatnoisesatthatlevelcanfrightenandconfusewhales.

 AteamofAmericanandCanadianscientistsdiscoveredthatloudernoisescanseriouslyinjuresomeanimals.

Theresearchteamfoundthatpowerfulunderwaterexplosionswerecausingwhalesintheareatolosetheirhearing.Thisseriouslyaffectedthewhales'abilitytoex?changeinformationandfindtheirways.Someofthewhalesevendied.Theexplo?sionshadcausedtheirearstobleedandbecomeinfected.

 Manyresearcherswhoseworkdependsonoceansoundsobjecttoalimitofonehundredandtwentydecibels.Theysaysuchalimitwouldmeananendtoimportantindustrialandscientificresearch.

 Scientistsdonotknowhowmuchandwhatkindsofnoisesareharmfultooceananimals.Howevermanyscientistssuspectthatnoiseisagreaterdangerthantheybelieved.Theywanttopreventnoisesfromharmingcreaturesintheocean.

1.Accordingtothepassagewhichofthefollowingisincreasinglydangeroustoseacreatures?

   A.Thesoundofacar.B.Thesoundofvoices.

   C.Manmadenoisepollution.D.Thesoundofsteps.

2.AccordingtothepassagenaturalsoundsincludeallofthefollowingEXCEPT   

   A.soundsmadebyanimalsthemselves

   B.oceandrillings

   C.underwaterearthquakes

   D.thebreakingoficefields

3.Whichofthefollowingisdiscussedinthethirdparagraph?

   A.Thesa

彭继慎回答:
  [文章大意]研究表明,噪声污染给海洋生物带来了威胁。科学家将要采取措施拯救海洋生物,阻止噪声对海洋生物的伤害。   1.C细节理解题。由第一段的"Somescientistssaythatani?malsintheoceanareincreasinglythreatenedbynoisepollu?tioncausedbyhumanbeings."可知,来自人类的噪声污染给海洋生物带来了威胁。   2.B细节理解题。由第二段的"Thesesoundsincludethebreakingoficefieldsunderwaterearthquakesandsoundsmadebyanimalsthemselves."可知选   B.   3.A细节理解题。由第三段可知,同样分贝的噪声在海洋和陆地所造成的影响是不同的。   4.B推理判断题。由文章的最后一句"Theywanttopreventnoisesfromharmingcreaturesintheocean."可知,禾斗学家将要采取措施阻止噪声对海洋生物的伤害。
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