20.Astronomers have discovered a new PINK planet on the edge of our solar system.
The small planet---given the name 2012VP 113 by scientists---is 80 times further from the Sun than the Earth.The newly discovered planet is 280 miles in diameter (直徑) and is in a distant area of the solar system beyond Pluto (冥王星) once thought to contain no planets at all.
The object is only the second to be found in a mysterious area at the boundary between the solar system and outer space called the inner Oort Cloud (內(nèi)奧爾特星云).
Astronomers now believe there may be thousands of previously unknown objects orbiting the Sun at this distance.And they believe that the pattern of the new planet's orbit suggests it is caused by the gravitational pull (引力) of a Super Earth that traces such a large orbit around the Sun that it has never been seen.
Astronomer Scott Sheppard,who found the new planet with his colleague,Chad Trujillo,said,"If you took a Super Earth and put it a few hundred astronomical units out,the gravity could shepherd (引導) this new object into the orbit it has."
The traditional view of the solar system had been that of nine planets orbiting the Sun.This was challenged in the 1990s when scientists found that Pluto is orbiting in thousands of icy objects called the Kuiper Belt.
Beyond this belt only one object,called Sedna,was thought to exist on its own.But the latest discovery suggests that our solar system has a number of planets at its edges.
32.Which of the following is TRUE?C
A.Astronomers now believe there must be thousands of previously unknown objects.
B.The object named 2012VP 113is only the first to be found in a mysterious area.
C.The latest discovery suggests our solar system has lots of planets at its edges.
D.The small planet is 80times further from the Earth than the Sun.
33.What can we know from the passage?D
A.Scott Sheppard found the new planet on his own.
B.In the 1990s,scientists found Pluto is orbiting in thousands of icy objects called Sedna.
C.The inner Oort Cloud was once thought to contain no planets at all.
D.Astronomers believe the gravitational pull of a Super Earth causes the pattern of the new planet's orbit.
34.What is the main idea of the passage?B
A.Astronomers name an object 2012VP 113.
B.Astronomers have discovered a new PINK planet on the edge of our solar system.
C.Astronomers prove the traditional view is wrong.
D.The latest discovery makes a big breakthrough in astronomy.
35.The passage is possibly taken fromB.
A.a(chǎn) science fiction
B.a(chǎn) news report
C.a(chǎn) poster
D.a(chǎn) magazine.
分析 本文主要寫了天文學家在太陽系邊緣發(fā)現(xiàn)了一顆新的粉紅色行星.
解答 32.C 細節(jié)理解題.根據(jù)句子Astronomers now believe there may be thousands of previously unknown objects orbiting the Sun at this distance,這里天文學家相信是有可能而不是一定,所以A選項不正確;根據(jù)句子Astronomers have discovered a new PINK planet on the edge of our solar system一個新的發(fā)現(xiàn)但是不是第一次發(fā)現(xiàn),所以選項B不正確;根據(jù)句子The small planet---given the name 2012VP 113 by scientists---is 80 times further from the Sun than the Earth可知D選項不正確.But the latest discovery suggests that our solar system has a number of planets at its edges可知最新的發(fā)現(xiàn)表明我們的太陽系邊緣有許多行星.所以答案選C.
33.D 推理判斷題.根據(jù)句子they believe that the pattern of the new planet's orbit suggests it is caused by the gravitational pull (引力) of a Super Earth that traces such a large orbit around the Sun that it has never been seen.他們認為,新行星軌道的模式表明,它是由一個超級地球的引力所造成的,它追蹤太陽如此大的軌道,卻從未見過它.由此可以推斷出超級地球的引力導致了新行星軌道的形成.
34.B 主旨大意題.根據(jù)文章第一句Astronomers have discovered a new PINK planet on the edge of our solar system.天文學家在太陽系邊緣發(fā)現(xiàn)了一顆新的粉紅色行星.可知答案選B.
35.B 推理判斷題.從文章第一句Astronomers have discovered a new PINK planet on the edge of our solar system.天文學家在太陽系邊緣發(fā)現(xiàn)了一顆新的粉紅色行星.概括出來了本文的主要內(nèi)容,然后介紹了具體的細節(jié),可以推測出這是一篇新聞報道,所以有可能出自一篇新聞報道,故答案選B.
點評 閱讀理解題測試考生在閱讀基礎上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關(guān)系,對未說明的趨勢或結(jié)局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細閱讀短文,完整了解信息,準確把握作者觀點.