阅读理解。
In 2000, at the age of 56, Jeff was going to take a difficult and dangerous journey in the Arctic. He
was planning to walk to the North Pole all by himself, pulling his food, tent andother things behind him
in two sledges (雪橇). Because the Arctic is covered with ice andwater, he would sometimes have to
sit on his sledges and use them like a boat.
Jeff was seven days into his journey in the Arctic. It was dark and terribly cold ( -35℃ ).In face of
this terribly low temperature, he had made good progress across the ice. Suddenly, ithe ice was broken
and one of his sledges fell into the sea. Jeff needed to get it back, so he hadto put his hand into the
ice-covered water.
Once he had got the sledge back, Jeff put up his tent, lit a fire and tried to warm up hiscold hand. It
was no help--his hand was seriously hurt as it had been in the cold for so long.He radioed for help, and
an airplane was sent to save him. Finally, he arrived at a hospital inCanada. The doctors there said he
hurt his left hand in the icy water. They saved his hand andadvised him not to travel to the North Pole
any more. But Jeff was an explorer and nobody could change his mind. It would be yet another long
and difficult battle for Jeff soon.
1. Jeff was planning to walk to the North Pole all by himself in
A. 1970
B. 1972
C. 1998
D. 2000
2. After one of his sledges fell into the sea, what did Jeff do first?
A. He put his hand into the water.
B. He lit a fire near the tent.
C. He warmed up his hand.
D. He put up his tent.
3. What can we infer (推断) from the last sentence of the article?
A. Jeff would practice more for the next journey.
B. Jeff would explore another part of the Arctic.
C. Jeff would try his best to realize his wish.
D. Jeff would refuse to take any advice.
被动土压力系数
静止土压力系数k0＝1-sin
