题目内容
6.Scientists announced that they had found the gravitational waves(引力波)that confirmed a prediction made by Albert Einstein a century ago.The discovery,made with the Laser Interferometer Gravitational-Wave Observatory,known as LIGO,is the milestone(里程碑)in a decades-long search for signs of this phenomenon."The discovery will open a new window onto the universe,"said David Reitze,executive director of LIGO.Since humans first watched skyward,we have relied on light of all wavelengths to describe the universe.The light that could be seen first showed the starry heavens,while infrared(红外线的)waves allowed us to see older and more distant stars.
But now,researchers will be able to sense the universe in a whole new way:with their"ears"."We can hear gravitational waves.We can hear the universe,"Gabriela Gonzalez,LIGO's spokeswoman at Louisiana State University,said."That's one of the beautiful things about this:We are not only going to be seeing the universe,we are going to be listening to it."
Gravitational waves,which Einstein predicted as part of his general theory of relativity,occur as objects accelerate or decelerate through space,much the way a boat moving on a lake sends waves across the water's surface.But they're so tiny that until now it's been nearly impossible to find them,even those caused by something as large as a planet moving around the sun.
To pick up this signal,scientists have to look for violent events in the universe.This particular signal appears to have been caused by a collision.That occurred about 1.3 billion years ago between two black holes,holding 29 and 36 solar masses(太阳质量).
Fiona Harrison,chair of Caltesh's division of physics,mathematics and astronomy,guessed that hundreds of new events would be found over the next few years,allowing scientists to perform a range of different types of studies."There are probably many events we haven't dreamed of and this is just the beginning,"she said.
29.Why did Gabriela Gonzalez think LIGO's discovery important?D
A.It confirmed Einstein's scientific prediction.
B.It allowed scientists to see more distant stars.
C.It changed traditional ideas about the universe.
D.It offered different way to study the universe.
30.It's hard to find gravitational waves because theyB.
A.are too far to be felt
B.are too weak to be observed
C.are disturbed bu other planets
D.disappear soon after they happen
31.Which of the following would scientists consider to be a violent event?C
A.Hearing the universe.
B.Searching for infrared waves.
C.A collision between black waves.
D.A planet moving around the sun.
32.It can be concluded thatB.
A.gravitational waves also exist in objects at rest
B.there's a long way to go in studying the universe.
C.gravitational waves show the beginning of the universe.
D.scientists began studying gravitational waves in recent years.
分析 本文是一篇科教类阅读,属于说明文,科学家们宣布,他们发现了这个引力波,证实了一个世纪前由爱因斯坦所做的预测.本文以此展开,主要讲述了有关宇宙的一些发现.
解答 29.D.细节理解题.根据The discovery,made with the Laser Interferometer Gravitational-Wave Observatory,known as LIGO,is the milestone(里程碑)in a decades-long search for signs of this phenomenon."The discovery will open a new window onto the universe,"said David Reitze,executive director of LIGO.可知,因为LIGO的发现为探索宇宙提供了多种方式.故选D.
30.B.细节理解题.根据But they're so tiny that until now it's been nearly impossible to find them,even those caused by something as large as a planet moving around the sun.可知,因为引力波非常弱小,所以没法探测到.故选B.
31.C.推理判断题.根据To pick up this signal,scientists have to look for violent events in the universe.This particular signal appears to have been caused by a collision.可知,科学家会认为黑波之间的碰撞是一场暴力事件.故选C.
32.B.推理判断题.根据Fiona Harrison,chair of Caltesh's division of physics,mathematics and astronomy,guessed that hundreds of new events would be found over the next few years,allowing scientists to perform a range of different types of studies."There are probably many events we haven't dreamed of and this is just the beginning,"she said.可知,探索宇宙的奥秘还有很长的路要走.故选B.
点评 本文是一篇科教类阅读,题目涉及多道主旨大意题,细节理解题,推理判断题.做题时学生应仔细阅读原文,把握文章主要内容,联系文章上下文内容并结合所给选项含义,从中选出正确答案,一定要做到有理有据,切忌胡乱猜测.
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A. | as three times big as | B. | three times as big as | ||
C. | as big as three times | D. | as big three times as |
Many birds (24)Ctwigs(细枝) and leaves and others wove their nests."We should also(25)A some food for our children,"said one of the birds.And they collected food(26)Dthey had enough to see them (27)B the rainy season.They kept themselves busy (28)Dthe bad times.
Soon the (29)C came.It was followed by thunder and lightning.All the animals and birds stayed at their homes.It kept raining for many(30)B.One day,a monkey(31)Cin the rain came into the jungle.He sat on a branch,(32)Awith cold.
The poor monkey tried his best to get a place,but(33)C.The leaves were not enough to save him from the rain."Brrr!It is so(34)D!"said the monkey.The birds were (35)Ball this.They felt sorry for the monkey,but there was little they could do for him.One of them said,"Brother!Our small nests are not(36)Cenough to give you shelter."Another bird said,"All of us prepared for the rainy season.If you had,you would not be in this difficult(37)D."
"How dare you tell me what to do?"said the monkey,shouting at the bird.The monkey(38)Bhit the bird's nest,tore and threw it on the ground.The bird and her babies were(39)A.
The poor bird thought,"Fools never value(重视) good(40)A.It is better not to advise them.
21.A.interested | B.angry | C.happy | D.worried |
22.A.changed | B.followed | C.dropped | D.arrived |
23.A.left | B.repaired | C.increased | D.loved |
24.A.wanted | B.made | C.brought | D.broke |
25.A.store | B.buy | C.borrow | D.steal |
26.A.if | B.after | C.when | D.until |
27.A.at | B.through | C.around | D.on |
28.A.looking back upon | B.taking care of | C.looking forward to | D.getting ready for |
29.A.sunshine | B.wind | C.rain | D.snow |
30.A.years | B.days | C.minutes | D.hours |
31.A.tall | B.big | C.wet | D.slow |
32.A.shaking | B.rising | C.thinking | D.jumping |
33.A.won | B.lost | C.failed | D.left |
34.A.high | B.funny | C.lucky | D.cold |
35.A.worrying | B.watching | C.explaining | D.enjoying |
36.A.dry | B.tall | C.big | D.comfortable |
37.A.plan | B.branch | C.jungle | D.situation |
38.A.bravely | B.angrily | C.worriedly | D.pleasantly |
39.A.helpless | B.nice | C.pleased | D.bored |
40.A.advice | B.time | C.experience | D.friendship |
A. | used up | B. | run out | C. | been given out | D. | been run out |