单选题 One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic. This one thing is the low temperature-the killing chill of the far North and the polar South.
To survive, men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times. Not even for moment can they be unprotected against the below-zero temperature.
Men have a way of providing for themselves. Polar explorers wrap themselves in warm coats and furs. The cold makes life difficult. But the explorers can stay alive.
What about animals? Can they survive? Do we find plants? Do we find life in the Arctic and the Antarctica? Yes. we do. There is life in the oceans. There is life on land.
Antarctica, as we have seen, is a cold place indeed. But this has not always been the case. Expedition scientists have discovered that Antarctica may have been much like our own.
Explorers have discovered coal in Antarctic

• a. This leads them to believe that Antarctica at one time was a land of swamps and forests. Heat and moisture must have kept the trees in the forests alive.
  Who call survive the severe cold in the Antarctica and in parts of the Arctic according to the passage?A. The explorers to these areas.B. All expedition scientists.C. Any person with good equipment.D. Only those who are well-equipment.