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107 bird和crab
V1
人类破坏了什么东西下蛋的环境,候鸟迁徙不得不停留更长时间觅食那个削弱题,这个是个原题~一模一样的,答案是会less successful吧。
V2
鸟在迁徙的过程中靠一种蛋为食,这种蛋的数量在减少,但是通过延长迁徙的时间 这些有限的蛋还是够鸟吃的。问削弱。我选的鸟迁徙的越早,迁徙成功率越高。
考古
有种鸟在迁徙途中会停在某个城市的沙滩的一处,然后吃沙滩上的一种动物的蛋,这种行为吸引了很多游客,政府为了吸引更多游客,从而增加收入,打算再建一个沙滩.问削弱.
还有一个就是游客因为海鸟聚集于沙滩食crab egg而被吸引,所以政府准备扩展海滩的,前面基金里面有的。
我选择的是,crab的蛋的density只有达到它下蛋的时候可能就挖到别人下的蛋上这种程度,这种鸟才吃的到crab的蛋
有种鸟在迁徙途中会停在某个城市的沙滩的一处,然后吃沙滩上的一种动物的蛋,这种行为吸引了很多游客,政府为了吸引更多游客,从而增加收入,打算再建一个沙滩.问削弱.(选那个和蛋的density有关的选项,确认一下)
该选项可参考,请注意以下GWD题里Birdwatcher的话,几乎就是这个月的答案。
参考GWD-11-Q27:
Mayor: Migrating shorebirds stop at our beach just to feed on horseshoe-crab eggs, a phenomenon that attracts tourists. To bring more tourists, the town council plans to undertake a beach reclamation project to double the area available to crabs for nesting.
Birdwatcher: Without a high density of crabs on a beach, migrating shorebirds will go hungry because shorebirds only eat eggs that a crab happens to uncover when it is digging its own nest.
Which of the following, if true, would provide the mayor with the strongest counter to the birdwatcher’s objection?
A、Every year a certain percentage of crabs are caught by fishermen as bait for eel traps.
B、Horseshoe crabs are so prolific that given favorable circumstances their numbers increase rapidly.
C、On average, tourists who come to the town in order to watch birds spend more money there than tourists who come for other purposes.
D、The additional land made available by the reclamation project will give migrating shorebirds more space.
E、Some of the migrating shorebirds make only one stop during their migration form South America to Canada.
“34. GWD17-Q34”:
During the month of May, crabs arrive on Delaware’s beaches to lay eggs. Certain shorebirds depend on these eggs for food during their annual spring migration to their northern breeding grounds. Delaware’s crab population has declined recently. This decline, however, poses no serious threat to the migrating shorebird populations: by remaining longer in Delaware, the birds will be able to eat enough crab eggs to allow them to complete their migration.
Which of the following, if true, most seriously weakens the argument?
No other food available to the birds on Delaware’s beaches is as nutritious and accessible as are crab eggs.
The decline in the number of crabs on Delaware’s beaches is due to the harvesting of crabs by humans.
There are more crabs on Delaware’s beaches than in any other area that the migrating birds pass through.
The crabs do not conceal their eggs.
The earlier in the season the shorebirds complete their migration, the more likely they are to breed successfully. |
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