问题
单项选择题
将单位时间内通过导体横截面积的（），叫电流强度。
A.电能
B.信号
C.电压
D.电量
答案
参考答案：D
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将单位时间内通过导体横截面积的（），叫电流强度。
A.电能
B.信号
C.电压
D.电量
参考答案：D
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| The Town of Pressure and the Town of Pleasure were neighbors but had nothing in common. Residents built walls to 1 influence from the other town. In Pressure, 2 struggled to be the very best. When women 3 birth, they would compete to have the baby with the loudest cry. There was violent competition in every aspect of life. Because 4 was the index (指数) of success, people were 5 busy making money, with no time for relaxation. Some young people couldn't bear the intensity and resorted to drink or drugs to escape. 6 , over in Pleasure, the motto was "As long as you like it, do it." People grew up without 7 and could do anything 8 liked. Children played computer games day and night. At school, teachers didn't care 9 students showed up or not.Workers might sit around the office 10 sipping coffee and doing nothing. 11 the lack of regulations, nobody worried about losing their jobs. It was 12 that mattered. No one had the slightest thought of moving 13 , either for themselves or for the town. The computers they used 14 old models from Pressure. Some of the young were addicted to 15 because of the emptiness of their lives. Then, people in the two towns began asking themselves, "What is life 16 ?" But, just before life in the two towns completely failed, there came a saint - Mr. Reason. He went from door to door, 17 with people and giving advice. People in Pressure learnt to be 18 with what they had, while people in Pleasure began to make plans. They 19 the walls between them and built a road to connect the two. The towns' people 20 to realize the truth - there is no space between Pressure and Pleasure if they don't go to extremes. | ||||
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