摘要:28.测灯泡的额定功率.器材如图所示:其中被测灯泡的额定电压为3.6V.电源电压恒为6V.电流表量程0-0.6A和0-3A.电压表量程为0-3V和0-15V.开关.滑动变阻器.备用导线若干. (1)给实物图补画出所缺导线.使它成为一个完整的实验电路. (2)若在实验过程中发现电压表“0-15V 量程不灵.无法按常规方法进行实验.请你在不增减器材的情况下.重新设计出测定小灯泡额定功率的电路图.并画在右边的方框内.若此方法测得电流表和电压表示数如图甲.乙所示.则灯泡此时的电功率为 W. (3)若实验室里有四种规格的滑动变阻器:“10Ω1A .“15Ω1.5A .“20Ω2A .“50Ω2A .则无论是正常实验还是后来重新设计的实验.都是选用 规格的滑动变阻器为宜.

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第二节 短文改错(共10小题;每小题1.5分,满分15分)
此题要求改正所给短文中的错误。对标有题号的每一行作出判断;如无错误,在该行右边横线上面一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:
此行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。
此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。
此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。原行没有错的不要改。
As we know, our country suffer heavy snow last                                          76. _________
Spring Festival. Everything was covered with heavily                                     77. _________
snow, that made the buses, trains and planes stop.                                                 78. _________
Million of people couldn't go home. Many people                                        79. _________
suffered trouble. There were no food, water or light in                                    80. _________
some places. Our government called on people to fight                                             81. _________
against the heavy snow. As a student, I think they should                                     82. _________
learn from that the heroes. We must study hard at school.                                           83. _________
We should learn all kinds knowledge to make our                                         84. _________
motherland strong, better and richer.                                                   85. _________

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此题要求改正所给短文中的错误。对标有题号的每一行做出判断

如无错误,在该行右边横线上画一个勾(√);

如有错误(每行只有一个错误),则按下列情况改正:

此行多一词, 把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并用斜线划掉。

此行缺一个词, 在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

此行错一个词, 在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原文没有错的不要改。

Sports and games do much good to our health.

They can make us strongly and keep us fit.Especially they can be of      __

very value to the people who work with their brains most of the            _____

day,for sports and games give people valuable practices in              ____

exercising the body.                                                   

Sports and games also very useful in character-training.                 _____ 

They usually demand not only of physical skill and strength               _____

but also courage,discipline and teamwork.For boys and                _____

girls,which is learned on the playground often has a deep effect           _____

on their character.If each of them learned to work for his team       ____

and not for him on the football field,he will later find it             ____

natural to work for good of his country,instead of for only his        ___

benefit.

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