A: its primitive character
B: becoming the strongest
C: the law of club and fang
D: adapt itself to the cold arctic
举一反三
- Arctic explorers may catch colds when ______. A: they are working in the isolated arctic regions B: they are writing reports in terribly cold weather C: they are free from work in the isolated arctic regions D: they are coming into contact again with the outside world
- The biggest difference of Arctic （北极）and Antarctic（南极） is A: The Arctic is the ocean surrounded by land, and the Antarctic is the land surrounded by ocean B: Arctic is bigger than Antarctic C: Arctic is warmer than Antarctic D: Upwelling is mostly at Arctic
- Eskimo people seem immune to the cold, Arctic weather. A: insusceptible to B: adaptable to C: harassed by D: defeated by
- There are three main ways that animals survive the cold in winter : sleep, adapt or migrate.
- A) Arctic ice is a major source of the world's fresh water.[br][/br] B) The melting Arctic ice has drowned many coastal cities.[br][/br] C) The decline of Arctic ice is irreversible.[br][/br] D) Arctic ice is essential to human survival.
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- 0
The Arctic fox is found throughout the Arctic, usually on tundra or mountains （）the sea. A: by which near B: near of C: because near D: near
- 1
Which of the following is true about the Arctic National Wildlife Refuge? A: It is a huge wildlife park. B: It is the largest protected wildness region in the US. C: It located within the arctic circle, in the region of Russia. D: It is the largest volcano park in the arctic circle.
- 2
Pugh visited the Arctic for the first time ________.
- 3
______ is quite different from the Arctic marine fauna.
- 4
It is important to study polar bears to assess the health of the ecosystem on the Arctic, because（） A: they are on the edge of extinction. B: they are on the top of the ecosystem. C: the food chain on the Arctic depends on them. D: there are no other big animals on the Arctic.