问题
填空题
天然紫外线的重要来源是____，地球周围大气层上部的____可吸收紫外线，使得日光中的紫外线大部分不能达到地面，但目前____正在受到空调、冰箱里逸出的____等物质的破坏，出现了“空洞”。
答案
太阳光；臭氧层；臭氧层；氟利昂
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天然紫外线的重要来源是____，地球周围大气层上部的____可吸收紫外线，使得日光中的紫外线大部分不能达到地面，但目前____正在受到空调、冰箱里逸出的____等物质的破坏，出现了“空洞”。
太阳光；臭氧层；臭氧层；氟利昂
| 阅读理解。 | |||
A man is going to open a shop selling hats. He wanted a good sign to put over his shop. He wrote:
"HATTER". Then he came to another friend for advice. This friend said that it was not polite to say "for ready money". So he crossed out "for ready money". The sign now said:
care who made it. So John crossed out that word, too. But when another friend saw "John Brown Sells Hats", he said, "Of course you sell hats. No one thinks you give them away for free." So, at last the sign read:
| |||
[ ] | |||
| A. pay for the hat here when you buy it B. if you buy the hat you can pay for it in a few days C. hats here are only for the people with much money | |||
| 2. How many friends gave John some advice on how to write the sign? | |||
[ ] | |||
| A. Three. B. Four. C. Two. | |||
| 3. ______ was crossed out first. | |||
[ ] | |||
| A. "John Brown Sells Hats" B. "Hatter" C. "for Ready Money" | |||
| 4. Each friend has ______ thought. | |||
[ ] | |||
| A. no B. the same C. his own | |||
| 5. This story tells us that ______. | |||
[ ] | |||
| A. it isn't possible to please everybody B. it's easy to sell hats C. sellers must please everybody |