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1、SAT每日一題附答案和解析[閱讀](2017年2月14日)Critical?Reading>Select?an?AnswerBuilding?a?road?through?wilderness?certainly?has?avisible?impact?on?local?flora?and?fauna—you'rephysically?paving?over?a?slice?of?what?was?oncehabitat.?But?roads?have?less?obvious?effects,?
2、too.Like?the?introduction?of?traffic?noise,?which?also?takesa?toll."You?can?see?an?oil?spill?but?you?can't?see?a?traffic?noise?spill.?So?convincing?people?thatit's?important?is?a?little?more?difficult,"?said?Heidi?Ware.Ware?is?an?ornithologist?at?the?Int
3、ermountain?Bird?Observatory?in?Boise,?Idaho.?She?and?hercolleagues?studied?the?reactions?by?birds?to?the?sounds?of?vehicles.?And?they?did?it?withoutpaving?the?great?outdoors.?Instead,?they?mounted?15?pairs?of?speakers?on?Douglas?fir?trees,along?a?ridge?n
4、ear?Boise,?and?played?traffic?noise.?They?thus?created?what?they?call?a?"phantomroad"?through?the?wilderness,?which?boosted?local?noise?levels?10?decibels?higher?than?those?inthe?surrounding?forest.Turns?out?just?the?sounds?of?traffic?scared?away?a?third
5、?of?the?area's?usual?avian?visitors,?andcut?species?diversity?too.?And?birds?of?multiple?species?were?not?able?to?pack?on?as?much?fatto?fuel?their?migrations,?when?they?were?forced?to?dine?to?the?soundtrack?of?traffic.Follow-up?experiments?in?the?lab?fou
6、nd?that,?when?it's?noisy,?birds?spend?a?lot?less?time?headdown,?pecking?at?food,?and?a?lot?more?time?scanning?their?surroundings.Ware?says?Yosemite,?Glacier?and?Rocky?Mountain?National?Parks?all?have?roads?that?are?busyenough?to?produce?these?effects.?An
7、d,?short?of?closing?park?roads?to?traffic,?she?says?thingslike?rubberized?asphalt?and?lower?speed?limits?could?help?cut?the?noise."Glacier?National?Park?isgoing?to?put?up?signs,?that?instead?of?showing?your?speed?and?preventing?people?fromspeeding,?it's?
8、going?to?show?how?loud?their?car?is?on?the?road."?Which,?hopefully,?will?continueto?encourage?wilderness?lovers?to?leave?no?trace—visible?or?audible.Based?on?the?passage,?which?of?the?following?would?most?likely?result?fro
