It is no _______ arguing about who is right and who is wrong, because he is as stubborn as a mule.(1分)-湖北继续教育网网校

[单选题]It is no _______ arguing about who is right and who is wrong, because he is as stubborn as a mule.(1分)

Ause

Bhelp

Ctime

Dwhile

收藏查看答案

参考答案

试题答案：

A

答案解释：

解题思路：本句考查对名词涵义的掌握。根据题意“跟他争辩谁对谁错一点用都没有，因为他犟的跟驴一样”。在It is+表语+动名词（作主语）的结构中，通常用no good, no use, dangerous等词语作表语，故正确答案为A）选项。

相关题目

4．教师最突出的角色是（）
They made friends with each other and formed a band in 1998, but then ________ after a quarrel about its future.(1分)
This book is a popular one, so you can get it in ________ bookstore.(1分)
Due to_____population growth, this country is badly in need of manpower.(1分)
—You were out when I dropped in at your house yesterday. —Oh, I________ for a friend from Beijing at the railway station.(1分)
4.5What is the best title of this passage?____(1分)
1.I’ll leave Changsha for Beijing ______ a week, while my brother will leave Beijing for Changsha ______ our National Day.(1分)
2.5 Which of the following best describes this story?____(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)3.1 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.Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a 7 week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps a minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject was taken had recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day's ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding.At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses were taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.(5分)4.1How many people were in each group?____(1分)A. 100.B. 50.C. 25. D. 15.

品质保障

效果保障

服务保障

低价保障