此题要求改正所给短文的错误。对标有题号的每一行作出判断：如无_爱下问搜题

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问题改错题

此题要求改正所给短文的错误。对标有题号的每一行作出判断：如无错误,在该行右边横线上划一个勾（√）；如有错误（每行只有一个错误）,则按下列情况改正：

该行多一个词：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。

该行缺一个词：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。

该行错一个词：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：原行没有错的不要改。

I was anxiously waited for your letter, and at last it 76. ___________

reached to me. I am very glad to know that everyone 77. ___________

at home is enjoying good health as usually. 78. ___________

Things here stay same now as they were before. 79. ___________

The final exam take place next week. So I am now 80. ___________

busy preparing for them. Anyway, it’s nice to think 81. ___________

that the summer vacation was coming near. I can’t say 82. ___________

how much I want to see you all again. I’m looking 83. ___________

forward to spend the summer holidays with you. Give my 84. ___________

love to father, mother and anyone at home. 85. ___________

答案

76. waited—waiting 77. 去掉to 78. usually—usual 79. same—the same

80. take place—will take place 81. them—it 82. was—is 83.正确 84. spend—spending 85. anyone—anyone else

问答题

物体在空中下落的过程中，重力做正功，物体的动能越来越大，为了“探究重力做功和物体动能变化间的定量关系”，我们提供了如下图的实验装置．

（1）某同学根据所学的知识结合右图设计一个本实验情景的命题：如图所示，设质量为m（已测定）的小球在重力mg作用下从开始端自由下落至光电门发生的位移s，通过光电门时的速度v，试探究外力做的功mgs与小球动能变化量

mv2的定量关系．

（2）某同学根据上述命题进行如下操作并测出如下数据．

①用天平测定小球的质量为0.50kg；

②用______ 测出小球的直径为10.0mm；（选填：刻度尺，游标卡尺，螺旋测微器）

③用刻度尺测出电磁铁下端到______的距离为80.40cm；

④电磁铁先通电，让小球______．

⑤让电磁铁断电，小球自由下落．

⑥在小球经过光电门时间内，计时装置记下小球经过光电门所用时间为2.50×10^-3s．

⑦计算得出重力做的功为4.02J，小球动能变化量为______J．（g取10m/s²，结果保留三位有效数字）

（3）试根据在（2）中条件下做好本实验的结论：______．

单项选择题

Throughout the 19th century and into the 20th, citizens of the United States maintained a bias against big cities. Most lived on farms and in small towns and believed cities to be centres of (1) , crime, poverty and moral (2) Their distrust was caused, (3) , by a national ideology that (4) farming the greatest occupation and rural living (5) to urban living. This attitude (6) even as the number of urban dwellers increased and cities became an essential (7) of the national landscape. Gradually, economic reality overcame ideology. Thousands (8) the precarious (不稳定的) life on the farm for more secure and better paying jobs in the city. But when these people (9) from the countryside, they carried their fears and suspicions with them. These new urbanities, already convinced that cities were (10) with great problems, eagerly (11) the progressive reforms that promised to bring order out of the (12) of the city.

One of many reforms came (13) the area of public utilities. Water and sewerage systems were usually operated by (14) governments, but the gas and electric networks were privately owned. Reformers feared that the privately owned utility companies would (15) exorbitant (过渡的) rates for these essential services and (16) them only to people who could afford them. Some city and state governments responded by (17) the utility companies, but a number of cities began to supply these services themselves. (18) of these reforms argued that public ownership and regulation would (19) widespread access to these utilities and guarantee a (20) price.

（8）（）

A.deserted

B.departed

C.abolished

D.abandoned