Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. It would be used to catch the rays (光線) of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror.
Why do they want to do this? The sun’s rays could be helpful in many ways. They could light up cities by night. The warm rays could stop frosts (霜凍) which might come at night and hurt fruit crops. They could melt (融化) dangerous icebergs in the ocean. Perhaps they could change cloud movements and bring rain where it is needed.
1.The huge mirror would ______.
A．stand 60 miles in height (高度) B．be 60 miles from side to side
C．cover 60 miles of the earth D．be 60 miles above the earth
2.The mirror would be used to ______.
A．reflect (反射) sunlight B．absorb (吸收) sunlight
C．see what the earth looks like D．see how clouds move
3.The strong light from the mirror could possibly ______.
A．hurt fruit crops B．set fire to cities
C．bring longer daytime D．shine through walls
4.The huge mirror is ______.
A．something in a story B．already made
C．just an idea D．to be made soon
1.B
2.A
3.C
4.C
【解析】
試題分析：本文敘述了科學家的一種想象，在地球的上方放一面60英里寬的鏡子，它可以用來為城市延長照明的時間，它的能量可以融化霜凍，以防霜凍凍壞莊稼。還可以融化冰山，能夠改變云的運動以便在需要雨的地方降雨。
1.細節理解題。根據It might be sixty miles wide.故選B。
2.細節理解題。根據It would be used to catch the rays (光線) of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror. 鏡子能反射陽光，故選A。
3.細節理解題。根據They could light up cities by night. 故選C。
4.細節理解題。根據Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. 這是科學家的想象出來的，故選C。
考點：科普類短文閱讀。
點評：細節題為閱讀考題的重頭戲，所占比例高達80% ，相對而言較簡單，因為這類題雖然要求理解準確，但基本上限于字面意義的理解，范圍也限于局部，因此是我們可望得高分的部分。細節題絕大部分體現“中心思想是解”這一原理。本文都是細節理解題，在文中比較容易找到答案。
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