问题
选择题
晚间，家里的电灯突然变暗，这是因为
A．电灯的实际电压变大
B．电灯的额定电压变小
C．电灯的实际功率变小
D．电灯的额定功率变小
答案
答案：C
家里的电灯突然变暗，这是因为电灯的实际功率变小 。
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晚间，家里的电灯突然变暗，这是因为
A．电灯的实际电压变大
B．电灯的额定电压变小
C．电灯的实际功率变小
D．电灯的额定功率变小
答案：C
家里的电灯突然变暗，这是因为电灯的实际功率变小 。
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| There is a good news for children in the countryside.We may still remember the girl ___1___ big eyes.Her big eyes are ___2___ us her dream:I wish to ___3___! In China,there are still ___4___ girls and boys like her.They want to go to school,but their ___5___ are too poor.If the family has two or three children,it is harder to ___6___ the money for all the children,so the parents often ask ___7___ to stay at home,and boys to go to school. Now they needn't ___8___ the money.From 2006,children can go to school for free(免费)in some poor places.They don't have to pay for books and other things.Some of them caneven get money from the government(政府)to make their life ___9___.Soon,all the children in the countryside can go to school for free.All families are very happy with the news.It is ___10great. | ||||
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