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[单选题]
You can fly to Taiwan tomorrow morning _______ you don’t mind changing planes in Hongkong.(1分)
A
provided
B
except
C
but
D
so
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参考答案
试题答案：
A
答案解释：
解题思路： 本题考查连词的用法。根据题意“假如你不介意在香港转机的话，明早你就能飞往台湾”。provided意为“以…为条件，假如”，故正确答案为A）选项。
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Young ________ he was, he was the CEO of the company.(1分)
6. (A)terrific (B)terrible (C) disappointing (D) surprising
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Father _______ me a transformer as my birthday gift when he came from work.(1分)
At first the boss threatened to him from his job,but later it turned out to be a mere bluff.(1分)
10. (A)dead (B)to die (C)death (D)dying
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
He believed that the greatest of his____ was that he'd never had a college education.
If you deny your children nothing, you will surely____ them.
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