1.选择题- (共2题)
Fat and shy, Ben Saunders was the last kid in his class picked for any sports team. “Football, tennis, cricket — anything with a round ball, I was useless," he says now with a laugh. But back then he was the one always made fun of in school gym classes in Devonshire, England.
It was a mountain bike he received for his 15th birthday that changed him. At first he went biking alone in a nearby forest. Then he began to ride the bike along with a runner friend. Gradually, Saunders set up his mind on building up his body, increasing his speed and strength. At the age of 18, he ran his first marathon.
The following year he met John Ridgway and started to work as a teacher at Ridgway's school of adventure(冒险)in Scotland, where he learnt about Ridgway's cold—waterexploits. Greatly interested, Saunders read all he could about North Pole explorers and adventures; he decided that this would be his future.
In 2001, after becoming a skillful skier, Saunders started his first long—distance expedition (探险) towards the North Pole. It took unbelievable energy. He suffered frostbite, ran into a polar bear and pushed his body to the limit, pulling his sled up and over the rocky mountains.
Saunders has become the youngest person to ski alone to the North Pole, and he's skied more of the North Pole by himself than any other British man. His old playmates would not believe the change.
2.单选题- (共1题)
A.点电荷是一个带有电荷的几何点,它是实际带电体的抽象,是一种理想化的模型 |
B.带电体如果本身大小和形状对它们间的相互作用影响可忽略,那么,可视为点电荷 |
C.很小的带电体一定可以看作点电荷 |
D.很大的带电体也有可能可以看作点电荷 |
3.解答题- (共1题)
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【1】题量占比
选择题:(2道)
单选题:(1道)
解答题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:0
7星难题:0
8星难题:0
9星难题:2