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[单选题]
In Mary’s ________, it is essential to have breakfast everyday.
A
idea
B
ideal
C
principle
D
opinion
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试题答案：
D
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It's high time you____ your out-of-date PC.
23. As we know, it is very important that a firm should pay attention to the training of its staff as there exist many weak points in its various departments. Staff training must have a purpose, which is defined when a firm considers its training needs, which are in turn based on job descriptions and job specifications.A job description should give details of the performance that is required for a particular job, and a job specification should give information about the behavior, knowledge and skills that are expected of an employee who works in it. When all of this has been collected, it is possible to make a training specification. This specifies (指明) what the training department must teach for the successful performance of the job, and also the best methods to use in the training period.There are many different training methods, and there are advantages and disadvantages of all of them. Successful training performances depend on an understanding of the difference between learning about skills and training in using them. It is frequently said that learning about skills takes place "off the job" in the classroom, but training in using these skills takes place "on the job", by means of such activities as practice in the workshop.It's always difficult to evaluate the costs of a training programme. The success of such a programme depends not only on the methods used but also on the quality of the staff who do the training. The evaluation of management training is much more complex than that.(10分)23.1 A training specification specifies____.A. the performance required for a certain jobB. the required behavior, knowledge and skillsC. the training contents and methods requiredD. the costs and the quality of the programme
1.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)1.1 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
3. (A)sad (B)happy (C)exicting (D)inspiring
Steven ________ the examination, but he wasn't careful enough.
It was through the Silk Road________ the four great ancient Chinese inventions of paper making, gunpowder, the compass and printing were introduced to the world.(1分)
Experiments on laboratory rats may teach us how cells reproduce, how heart muscles grow, and even _______ can be prevented.(1分)
It is uncertain____side effect the medicine will bring about，although about two thousand patients have taken it.(1分)
3.4 According to the passage, a boy of fourteen years old sleeps ________.(1分)
WhyDo you look so____? You never smile or lookCheerful
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