举一反三
- 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.
- 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
- Like the island continent of America, Australia is located entirely in (). A: the Northern Hemisphere B: the Southern Hemisphere C: the North Pole D: the South Pole
- The continent of Australia is the smallest, flattest and driest continent in the world.( )
- 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.
内容
- 0
Australia has always been a continent with few people, because most of the continent is______and________.
- 1
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
- 2
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.
- 3
Pugh visited the Arctic for the first time ________.
- 4
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