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2013年英语四级考试每日一练(5月28日)

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1. Questions63-12are based on the following passage.
If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, eventually he will be swinging quite high. The child can do this for himself by using his legs to increase the motion, but both the mother's push and the child's leg movements must occur at the proper moment, or the extent of the swing will not increase. In physics, increasing the swing is increasing the amplitude ( 振幅 ); the length of the rope on the swing determines its natural oscillation ( 摆动 ) period. This ability of an object to move periodically or to vibrate when stimulated by a force operating in its natural period is called resonance.
Resonance is observed many times without consciously thinking about it; for example, one may find an annoying vibration or shimmy in an automobile, caused by a loose engine mount vibrating with increasing amplitude because of an out- of-round tire. The bulge ( 凸出部分) on the tire slaps the pavement with each revolution; at the natural resonance point of the engine mount, it will begin to vibrate. Such vibrations can result in considerable damage if allowed to persist. Another destructive example of resonance is the shattering of a crystal goblet by the production of a musical tone at the natural resonant point of the goblet. The energy of the sound waves causes vibration in the glass; as its amplitude increases, the motion in the glass exceeds the elasticity of the goblet, and it shatters.
An instrument called a tachometer (转速计) makes use of the principle of resonance. It consists of many tiny bars, loosely fastened together and arranged so that each bar can slide independently of the others. Movement of the bars causes changes in a dial. When placed next to a rotating motor or engine, the tachometer picks up slight vibrations which are transferred to the resonant bars. These bars begin to move, and the resulting dial may be read to find the revolutions per minute of the motor very quickly.
注意:此部分试题请在答题卡2上作答。

An object, if moving rhythmically when stimulated in a natural period, is said to __
A.vibrate
B.resonate
C.swing
D.oscillate
2.

A.provided
B.offered
C.convinced
D.equipped
3. 根据以下资料回答{TSE}题:


In the sentence "Stubbornly we wait for someone else to reach out to us...", the phrase "reach out" is closest in meaning to __________.

翻译题
4. Only then________ (莫妮卡才意识到她有多爱她的丈夫).

5. 5. What does the author suggest we do to help children with ADHD?
[A] Find more effective drugs for them.
[B] Provide more green spaces for them.
[C] Place them under more personal care.
[D] Engage them in more meaningful activities.
6. What is the key to the shark’s swift locomotion in water?
A.The skin.
B.The tail.
C.The muscle.
D.The jaw.
7. __________(多亏了你及时的帮忙)that we accomplished the task on time.
8. 请在(54)处填上答案。
写作
9. Directions:For this part,you are allowed 30 minutes to write a short essay on the topic of Foreigners'Learning Chinese.You shouM write at least 120 words according to the outline given below.
1.国外掀起学汉语热
2.出现这种现象的原因
3.我的看法
Foreigners'Learning Chinese
10.

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