2. 外语
  3. Color is very important to most animals for it helps them to get along in the world. Color【21】to make an animal difficult for it

Color is very important to most animals for it helps them to get along in the world. Color【21】to make an animal difficult for it

admin2011-05-29  15
问题     Color is very important to most animals for it helps them to get along in the world. Color【21】to make an animal difficult for its enemies to【22】. Many animals match their【23】 so well that as long as they do not move no one is【24】 to see them. You probably have often "jumped" a rabbit. If you【25】, you know how the rabbit  sits perfectly still【26】 you are just a few feet away. You【27】 see the rabbit till it runs for its【28】 matches very closely the place where it is【29】. Many times you may have walked past a rabbit【30】 didn’t run and you never knew it was there at all.
    One of the most usual color schemes that helps animals to keep【31】 being seen, is a dark back and light underpants. If an animal is the same color all【32】, there is always a dark shadow along the animal’s belly (腹部).【33】an enemy couldn’t see the animal he could see this dark shadow. The shadow makes the animal【34】 out to view. But if the belly is【35】 than the rest of the animal, the shadow will not be noticed.
选项 A、helps
B、contributes
C、tries
D、manages
答案A
解析 A项helps意为“帮忙，帮助”，符合题意。B项contributes意为“贡献”；C项tries意为“试图”；D项manages意为“设法”。
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