根据短文内容，用方框中所给单词的适当形式填空，每词限用一次。

Scientists would like to put a huge mirror in space above the earth. It might be sixty miles wide. It would be   小题1:to catch the rays of the sun. it would direct the sun’s rays on the earth as a child might do to make sunlight   小题2: on the wall with a hand mirror.

Why do they want to do this? The sun’s rays could be   小题3:  in many ways. They could light up   小题4:  by night. The warm rays could stop frosts(霜冻) which might come at night and hurt fruit and crops. They could melt（融化) 小题5: icebergs in the ocean. Perhaps they could change cloud movements and bring rain where it is needed.

16V240ZJB型柴油机锻铝活塞第一、二道活塞环的侧向间隙为（）。

A、0.11～0.17mm

B、0.13～0.19mm

C、0.09～0.15mm

D、0.12～0.18mm