根据短文内容及首字母提示,填写所缺单词,使短文意思完整。每空一词Doyouknowwhydifferentan...
问题详情:
根据短文内容及首字母提示,填写所缺单词,使短文意思完整。每空一词
Do you know why different animals or pests (害虫) have their (1) s________ colours? Colours in them seem to be mainly used to protect themselves.
Some birds like eating locusts (蝗虫),but birds cannot easily catch them. Why? It is because locusts change their colours with the (2) c________ of the colours of crops. When crops arc green, locusts look green. But as the harvest time (3) c________, locusts change into the same brown colour (4) a________ crops have. Some other pests whose colours are different from plants are easily found and eaten by others. So they have to hide themselves for lives and (5) a ________ only at night.
Colours are useful not only on the (6) l________, but also in the sea. A kind of fish in the sea can (7) g________ out a kind of black liquid (液体) when they face (8) d ________. The liquid spreads over quickly, so they cannot be found by their (9) e________ and can quickly swim away. That is why they can live safely (10) t________they are not strong at all.
【回答】
1. special 2. changes3. comes 4. as 5. appear
6. land 7. give 8. danger 9. enemies10. though
知识点:短文填空
题型:阅读填空
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