练习：
1) The lowest temperature that man has ever known was recorded in Antarctica.
A. Right B. Wrong C. Not mentioned
2) Winter temperatures average 85 degrees below zero in Antarctica.
A. Right B. Wrong C. Not mentioned
3) The Arctic and Antarctica are no man's lands because of their notorious coldness.
A. Right B. Wrong C. Not mentioned
4) Polar explorers can stay alive without heaters and windproof shelters.
A. Right B. Wrong C. Not mentioned
5) Despite the hostile environment,both animals and plants can be found in the oceans and on land in polar areas.
A. Right B. Wrong C. Not mentioned
6) As discovered by expedition scientists,Antarctica has not always been so cold as it is today,so has the Arctic.
A. Right B. Wrong C. Not mentioned
7) At one time,the weather in Antarctica was so warm and damp that trees grew there.
A. Right B. Wrong C. Not mentioned
参考答案：A B B B A C A
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