首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置：
模拟考场
>
学士学位英语
>
浏览试题
[单选题]
The doctor has warned time and again that smoking will his health,but Johnny just won't listen.(1分)
A
effect
B
reduce
C
affect
D
deserve
收藏
查看答案
参考答案
试题答案：
C
答案解释：
相关题目
________ we have already decided, we have to move on rather than hesitate.(1分)
4.4 What need the travelers NOT do to stay on guard in a foreign country?(1分)
_________in the countryside made Mr. Wilson very hardworking when he was still young.(1分)
By convincing me _______ no good could come of arguing more, she persuaded me to compromise.(1分)
Radar makes it possible _______ a rocket during flight.(1分)
Lin Dan, the two-time defending world champion, raced to a 7-lead in the second game, ________ a stunned Lee Chong Wei started to even find his rhythm．(1分)
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)3.1Friction 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
We met an old friend in New York ____our expectation. She waved at us _____ the street when she saw us.(1分)
22.3 The summer school in the United States usually lasts ______.(2分)
2.5 Which of the following best describes this story?____(1分)
热门试题
1.
15．1925 年国民政府将所辖各部队统一改编为
2.
96. 对于园林植物蛀干害虫的热点叙述正确的是( )（1分）
3.
8.清单法属于
4.
社会主义社会的基本矛盾是
5.
简述弗兰克·杰夫金斯提出的公共关系策划工作法的具体内容。
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3418做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有2214做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1901做题
湖北成考专升本政治真题（2021年）
去做题
已有1366做题
湖北成考高起点语文真题（2021年）
去做题
已有1233做题
