摘要: The mirror would be used to . A. reflect sunlight. B. absorb sunlight. C. see what the earth looks like. D. see how clouds move.

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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 (光线) 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 (霜冻) 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

 

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 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 (光线) 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 cities by night. The warm rays could stop frosts (霜冻)which might come at night and hurt (伤害)fruit crops. They could melt (融化)dangerous icebergs (冰山)in the ocean. Perhaps they could change cloud movements and bring rain where it is needed.

1The huge mirror is ______.   

[  ]

Ato be made soon    Bbeing made

Csomething in a story   Djust an idea

2From this passage we can see that scientists ______.   

[  ]

Aare hard-working

Bare working hard to find ways to make good use of the sunlight

Clike big mirrors

Dlike something new

3The huge mirror would ______.   

[  ]

Abe 60 miles above the earth

Bbe 60 miles from side to side

Ccover 60 miles above the earth

Dstand 60 miles in height

4The mirror would be used to ______.   

[  ]

Asee how clouds move

Breflect (反射)sunlight

Csee what the earth looks like

Dabsorb (吸收)sunlight

5The strong light from the mirror could possibly ______.   

[  ]

Ahurt fruit crops

Bset fire to cities

Cshine through walls

Dbring longer daytime

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