14.A telescope (望遠(yuǎn)鏡),called Gaia,is being designed by astronomers in Europe,and it couldn't be more different from Pan-STARRS,which is another telescope being designed.While Pan-STARRS will be looking for asteroids (小行星) and comets headed for Earth,Gaia will be looking at our entire galaxy (銀河系).
Gaia is designed to draw a map of the Milky Way,our home galaxy.Just as a map of your town gives you a picture of where things are located,Gaia's map of the galaxy will tell astronomers where the stars are.Over five years,Gaia will observe (觀察) about a billion stars and other objects in our galaxy.Each object will be observed about 70times.
Gaia will be sent into space connected to a rocket.It contains two telescopes,each focused at a different angle (角度).These two telescopes act like Gaia's"eyes".The reason why humans can see things in 3D is that we have two eyes focused on the same object,at slightly different angles.By using two telescopes like eyes,Gaia can produce the first 3D map of the positions of the stars it views.
Gaia,which is to be sent into space in 2011,will be a powerful telescope.If you were to use it on Earth,for example,you could stand 600miles away from your best friends and still get a clear picture of their hair.
Gaia is one of more than a dozen telescopes being designed by scientists right now.The next generation of telescopes will reveal new parts of our universe that will seem surprising.The universe,with all its planets,stars and other strange objects,is a puzzle with pieces that we can see by using powerful telescopes.
28.How many different angles can Gaia focus at each time?A
A.2.
B.3.
C.4.
D.5.
29.The map to be drawn by GaiaD.
A.can show every building on Earth
B.can show you where your town is
C.will just show the stars around Earth
D.will show where the stars are in our home galaxy
30.What's Paragraph 4mainly about?C
A.What Gaia will do in space.
B.When Gaia will start to work.
C.How powerful Gaia will be.
D.What Gaia will do to Earth.
31.The underlined sentence in the last paragraph suggests that the next generation of telescopesD.
A.seem very surprising to scientists
B.will not be put into use in a short time
C.will just look at new things in universe
D.will be more powerful than the old generations.
分析 本文屬于說明文閱讀,作者通過這篇文章主要向我們描述了威力強(qiáng)大的望遠(yuǎn)鏡蓋亞,并介紹新一代的望遠(yuǎn)鏡將會(huì)更加強(qiáng)大.
解答 28.A.細(xì)節(jié)理解題.根據(jù)第三段Gaia will be sent into space connected to a rocket.It contains two telescopes,each focused at a different angle 可知蓋亞每次能聚焦2個(gè)不同的角度;故選A.
29.D.細(xì)節(jié)理解題.根據(jù)第二段Gaia's map of the galaxy will tell astronomers where the stars are可知蓋亞繪制的銀河系地圖將告訴天文學(xué)家星星在哪里;故選D.
30.C.段落大意題.根據(jù)第四段Gaia,which is to be sent into space in 2011,will be a powerful telescope.If you were to use it on Earth,for example,you could stand 600miles away from your best friends and still get a clear picture of their hair可知主要關(guān)于它強(qiáng)大的威力;故選C.
31.D.推理判斷題.根據(jù)第四段The next generation of telescopes will reveal new parts of our universe that will seem surprising可知后一代的望遠(yuǎn)鏡將會(huì)比這一代的更加強(qiáng)大;故選D.
點(diǎn)評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力,做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確的選擇.在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí),要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷.