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根据上表中的记录,请解答下面的问题。
(1)求通电2min壶中的水吸收的热量;[c水=4.2×103J/(kg·℃)](2分)
(2)求电水壶中发热体正常工作时的电阻值;(2分)
(3)求2min内电水壶消耗的电能和实际功率。(3分) 查看习题详情和答案>>
在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给出。
【小题1】Don’t be afraid of m_________ mistakes when you speak English.
【小题2】He h doing the chores because he thinks they’re boring.
【小题3】He will do better if you give him one more c .
【小题4】Thursday is the f________ day of a week, not the fourth.
【小题5】Jim is h than Paul . That is to say,Paul is thinner than Jim.
在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给出。
【小题1】Hurry up, or we won't c_________the early bus.
【小题2】He was so s that he had to go to bed early.
【小题3】Susan was so careless_ that she made many m ___ in the test.
【小题4】No one can go into the garden without p_______ .
【小题5】Most people are t of snakes.
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A B C D E
在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给出。
1.The policeman asked politely, “ May I look at your driver’s l_______?”
2.There will be a Chinese painting e________ in the national museum next week.
3.Pass me that pair of glasses, please. I can’t see the words c___________.
4.What a nice girl Lucy is! She often h_________to do housework.
5.Betty can speak two l__________, Chinese and English.
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