下列运动的物体中，受力平衡的是( )．A．自由下落的苹果B．加

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问题单项选择题

下列运动的物体中，受力平衡的是( )．

A．自由下落的苹果
B．加速上升的火箭
C．沿斜面匀速下滑的木块
D．减速行驶的机车

答案

参考答案：C

解析：根据物体受力平衡的定义及平衡时的特征可知选项C正确，A、B、D中物体均具有加速度，受力不平衡．

听力题

66. He was ________ (好奇) to know what was happening in the office.

67. There is much work to do, so we’ll have to________ (分) it between us.

68. His nose ran , he coughed, and his _________ (体温) was a little up.

69. The_____ (第十二) man in a football team will play if one of the other players is ill.

70. It’s no use_________(后悔) what you have done.

71. The acceptance of new members is________(严格) controlled.

72. When building ________ (材料) cost more. the price of houses increases.

73. Leave your key with a______ (邻居) in case you lock yourself out one day.

74. The idea started in Standlake and has_____(传开) throughout the country.

75. It’s cold today, Please put another________ (毯子) on the bed.

问答题

读下面一段话，完成后面的题目。

《穷人》这篇文章的作者是俄国作家列夫·托尔斯泰根据法国著名作家雨果的长诗《贫苦人》改写的。小说按照原诗的主要情节，以细腻而深刻的笔法，刻画了桑娜和她的丈夫善良质朴和克己待人，同时揭示了当时劳动人民的悲惨命运。

1．用修改符号修改短文中的病句。

2．这段话介绍了《穷人》这篇小说的_________和________以及_________ 。