2011年考研英语备考：英语阅读专项特训(1)[4]

来源：网络时间：2010-10-13 11:23:53

affirmed.

　　[D] A theory is proposed, considered and then amended.

　　4. Which of the following, if presented as the first sentence of a succeeding paragraph, would most logically continue the discussion presented in the passage?

　　[A] Ships are another possibility, but they would need to stop every 50 kilometers to lower measuring instruments.

　　[B] To understand how ocean acoustic tomography works, it is necessary to know how sound travels in the ocean.

　　[C] Timekeeping in medical tomography must be precise because the changes in travel time caused by density fluctuations are slight.

　　[D] These variations amount to only about 2 to 3 percent of the average speed of sound in water, which is about 1500 meters per second.

　　5. The author mentions EL Nino primarily in order to emphasize .

　　[A] the difficulty of measuring the ocean’s largescale currents.

　　[B] the variability of mesoscale phenomena.

　　[C] the brief duration of weather patterns.

　　[D] the possible impact of mesoscale fields on weather conditions.

　　核心词汇

　　circulation n. 流通,循环,发行量

　　identify v.识别;(with)把…和…看成一样,打成一片

　　dominate v. 支配,占优势

　　mesoscale n. & a.[气] 中尺度(的) ,中等规模的

　　fluctuate v. 变动,上下,动摇 v. 使动摇

　　velocity n. 速度,速率

　　phenomenon n. 现象(pl.phenomena)

　　equatorial a. 近赤道的,赤道的

　　prohibitive a. 禁止的,抑制的,类同禁止的

　　conventional a. 普通的,常见的,习惯的,常规的

　　feasible

结束

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