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20．在抗美援朝战争中担任中国人民志愿军司令员兼政治委员的是
A
A．朱德 B．陈毅C．彭德怀 D．刘伯承
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C
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四、论述题（本大题共 2 小题，每个小题 10 分，共 20 分）
22．新中国第一部婚姻法颁布的时间是
1929年4月，毛泽东在兴国发布第二个土地法，将“没收一切土地”改为“没收一切公共土地及地主阶级的土地”。这一个原则性的改正，保护了（ ）
1956年，陈云在中共八大上提出了（ ）
6．19 世纪末，在帝国主义列强瓜分中国的狂潮中提出“门户开放”政策的国家是
26．我国对资本主义工商业的社会主义改造所采取的基本政策是
12.【题干】1938 年 3 月，国民党军队在抗日战争正面战场上取得胜利的战役是
18．1945 年 9 月 19 日，中共中央正式确定的战略方针是
5．1839 年组织编写成《四洲志》，向中国人介绍西方情况的是
7．《共产党宣言》第一个中文全译本的译者是
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1.
23．资本主义的生产成本是（ ）
2.
对一批灯具在其额定电压下进行产品质量测试，发现其在使用到150小时时产品可靠度为0.6，此时的累积失效概率为
3.
3. Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)3.1 Friction arises when____.(1分)A. an opposing force of motion exists B. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
4.
11．描述数据仓库内数据的结构和建立方法的数据是
5.
颜真卿《元结墓碑》把“张维瑾”写作“张瑾”，是为了避父讳“维贞”。这种避讳属于（ ）
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