2014年职称英语理工类阅读理解练习(15)
<p> <span word="Black">Black</span> <span word="Holes">Holes</span> <span word="Trigger">Trigger</span> <span word="Stars">Stars</span> <span word="to">to</span> <span word="Self">Self</span>-<span word="Destruct">Destruct</span></p><p> <span word="Scientists">Scientists</span> <span word="have">have</span> <span word="long">long</span> <span word="understood">understood</span> <span word="that">that</span> <span word="supermassive">supermassive</span> <span word="black">black</span> <span word="holes">holes</span> <span word="weighing">weighing</span> <span word="millions">millions</span> <span word="or">or</span> <span word="billions">billions</span> <span word="of">of</span> <span word="suns">suns</span> <span word="can">can</span> <span word="tear">tear</span> <span word="apart">apart</span> <span word="stars">stars</span> <span word="that">that</span> <span word="come">come</span> <span word="too">too</span> <span word="close">close</span>.<span word="The">The</span> <span word="black">black</span> <span word="hotels">hotels</span> <span word="gravity">gravity</span> <span word="pulls">pulls</span> <span word="harder">harder</span> <span word="on">on</span> <span word="the">the</span> <span word="nearest">nearest</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="star">star</span>，<span word="an">an</span> <span word="imbalance">imbalance</span> <span word="that">that</span> <span word="pulls">pulls</span> <span word="the">the</span> <span word="star">star</span> <span word="apart">apart</span> <span word="over">over</span> <span word="a">a</span> <span word="period">period</span> <span word="of">of</span> <span word="minutes">minutes</span> <span word="or">or</span> <span word="hours">hours</span>，<span word="once">once</span> <span word="it">it</span> <span word="gets">gets</span> <span word="close">close</span> <span word="enough">enough</span>.</p><p> <span word="Scientists">Scientists</span> <span word="say">say</span> <span word="this">this</span> <span word="Uneven">Uneven</span> <span word="pulling">pulling</span> <span word="is">is</span> <span word="not">not</span> <span word="the">the</span> <span word="only">only</span> <span word="hazard">hazard</span> <span word="facing">facing</span> <span word="the">the</span> <span word="star">star</span>.<span word="The">The</span> <span word="strain">strain</span> <span word="of">of</span> <span word="these">these</span> <span word="unbalanced">unbalanced</span> <span word="forces">forces</span> <span word="can">can</span> <span word="also">also</span> <span word="trigger">trigger</span> <span word="a">a</span> <span word="nuclear">nuclear</span> <span word="explosion">explosion</span> <span word="powerful">powerful</span> <span word="enough">enough</span> <span word="to">to</span> <span word="destroy">destroy</span> <span word="the">the</span> <span word="star">star</span> <span word="from">from</span> <span word="within">within</span>.<span word="Matthieu">Matthieu</span> <span word="Brassart">Brassart</span> <span word="and">and</span> <span word="Jean">Jean</span>-<span word="Pierre">Pierre</span> <span word="Luminet">Luminet</span> <span word="of">of</span> <span word="the">the</span> <span word="Observatoire">Observatoire</span> <span word="de">de</span> <span word="Paris">Paris</span> <span word="in">in</span> <span word="Meudon">Meudon</span>，<span word="France">France</span>1,<span word="carried">carried</span> <span word="out">out</span> <span word="computer">computer</span> <span word="simulations">simulations</span> <span word="of">of</span> <span word="the">the</span> <span word="final">final</span> <span word="moments">moments</span> <span word="of">of</span> <span word="such">such</span> <span word="an">an</span> <span word="unfortunate">unfortunate</span> <span word="stars">stars</span> <span word="life">life</span>，<span word="as">as</span> <span word="it">it</span> <span word="veered">veered</span> <span word="towards">towards</span> <span word="a">a</span> <span word="supermassive">supermassive</span> <span word="black">black</span> <span word="hole">hole</span>.</p><p> <span word="When">When</span> <span word="the">the</span> <span word="star">star</span> <span word="gets">gets</span> <span word="close">close</span> <span word="enough">enough</span>，<span word="the">the</span> <span word="uneven">uneven</span> <span word="forces">forces</span> <span word="flatten">flatten</span> <span word="it">it</span> <span word="into">into</span> <span word="a">a</span> <span word="pancake">pancake</span> <span word="shape">shape</span>.<span word="Some">Some</span> <span word="previous">previous</span> <span word="studies">studies</span> <span word="had">had</span> <span word="suggested">suggested</span> <span word="this">this</span> <span word="flattening">flattening</span> <span word="would">would</span> <span word="increase">increase</span> <span word="the">the</span> <span word="density">density</span> <span word="and">and</span> <span word="temperature">temperature</span> <span word="inside">inside</span> <span word="the">the</span> <span word="star">star</span> <span word="enough">enough</span> <span word="to">to</span> <span word="trigger">trigger</span> <span word="intense">intense</span> <span word="nuclear">nuclear</span> <span word="reactions">reactions</span> <span word="that">that</span> <span word="would">would</span> <span word="tear">tear</span> <span word="it">it</span> <span word="apart">apart</span>.<span word="But">But</span> <span word="other">other</span> <span word="studies">studies</span> <span word="had">had</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="the">the</span> <span word="picture">picture</span> <span word="would">would</span> <span word="be">be</span> <span word="complicated">complicated</span> <span word="by">by</span> <span word="shock">shock</span> <span word="waves">waves</span> <span word="generated">generated</span> <span word="during">during</span> <span word="the">the</span> <span word="flattening">flattening</span> <span word="process">process</span> <span word="and">and</span> <span word="that">that</span> <span word="no">no</span> <span word="nuclear">nuclear</span> <span word="explosion">explosion</span> <span word="should">should</span> <span word="occur">occur</span>.</p><p> <span word="The">The</span> <span word="new">new</span> <span word="simulations">simulations</span> <span word="investigated">investigated</span> <span word="the">the</span> <span word="effects">effects</span> <span word="of">of</span> <span word="shock">shock</span> <span word="waves">waves</span> <span word="in">in</span> <span word="detail">detail</span>，<span word="and">and</span> <span word="found">found</span> <span word="that">that</span> <span word="even">even</span> <span word="when">when</span> <span word="their">their</span> <span word="effects">effects</span> <span word="are">are</span> <span word="included">included</span>，<span word="the">the</span> <span word="conditions">conditions</span> <span word="favor">favor</span> <span word="a">a</span> <span word="nuclear">nuclear</span> <span word="explosion">explosion</span>.<span word="There">There</span> <span word="will">will</span> <span word="be">be</span> <span word="an">an</span> <span word="explosion">explosion</span> <span word="of">of</span> <span word="the">the</span> <span word="star">star</span><span word="it">it</span> <span word="will">will</span> <span word="be">be</span> <span word="completely">completely</span> <span word="destroyed">destroyed</span>, <span word="Brassart">Brassart</span> <span word="says">says</span>. <span word="Although">Although</span> <span word="the">the</span> <span word="explosion">explosion</span> <span word="obliterates">obliterates</span> <span word="the">the</span> <span word="star">star</span>，<span word="it">it</span> <span word="saves">saves</span> <span word="some">some</span> <span word="of">of</span> <span word="the">the</span> <span word="stars">stars</span> <span word="matter">matter</span> <span word="from">from</span> <span word="being">being</span> <span word="devoured">devoured</span> <span word="by">by</span> <span word="the">the</span> <span word="black">black</span> <span word="hole">hole</span>.<span word="The">The</span> <span word="explosion">explosion</span> <span word="is">is</span> <span word="powerful">powerful</span> <span word="enough">enough</span> <span word="to">to</span> <span word="hurl">hurl</span> <span word="much">much</span> <span word="of">of</span> <span word="the">the</span> <span word="stars">stars</span> <span word="matter">matter</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span> <span word="black">black</span> <span word="holes">holes</span> <span word="reach">reach</span>，<span word="he">he</span> <span word="says">says</span>.</p>
页:
[1]