David Niven

A、H2 receptor antagonist

B、used to treat peptic ulcer

C、most potent inhibitor of meal stimulated acid secretion

D、interfere with drug metabolism enzyme

E、less used due to its side effects

[ A] they have enough time to dispose of the stolen cars

[ B] they have a special interest in American cars

[ C] American cars are popular among the dealers

[ D] American cars are usually new and expensive

[B] took

[C] got

[D] brought

Directions :

Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark

your answers on, ANSWER SHEET1.

Text 1

In recent years scientists have found that the laser has a wide variety of applications, making it one of the most important inventions for improving our quality of life.

One important field in which the laser has many applications is communications. Scientists have found that the laser beam can transmit human voices; as a result, telephone companies are now using laser light signals to transmit telephone calls through extremely small cables that are ca-pable of carrying many more transmissions than the standard telephone cables. An additional advan-tage is that these systems using the laser light signals are also able to transmit video telephone con-versations.

Another, perhaps less-known, field in which lasers are helping improve the quality of life is metrology-the science of measurement. The extremely straight, narrow laser beam can be used to put the parts of a structure being built into the correct position to each other. The laser beam has al- so been used to measure remote distances, for example, the precise distance from the Earth to the Moon. And finally, the laser can be used to measure the drifts of the Earth's plates. This measure- ment , along with other data, can help in the prediction of the earthquakes.

Probably the most vital application of the laser is in the field of medicine. Scientists have de-veloped a laser knife that surgeons can use for operations. These knives are now used widely because they cut sharply and because the beam seals off the blood vessels that it cuts, thus reducing blood loss considerably.

When Dr. Theodore got the first laser to work in July 1960, what uses it would have were un- known; in fact he called it a multimillion-dollar " solution in search of a problem". As we have seen, the uses of the laser are numerous. It is being used in the fields of medicine, communica-tions, and metrology. There are many, many more applications, such as in the areas of defense and space travel. What should be apparent by now is that there are many problems the laser is help-ing to solve, and that the laser, if used wisely, can be a life-saving device.

46. According to the text, the laser can_________ .

[ A] standardize telephone cables

[ B ] remove communications jams

[ C] improve the quality of human voices

[ D] increase the capacity of communications

[A] the police have got involved in them

[B] the stolen cars sell well in the world market

[C] the thieves are familiar with the parking garages

[D] they are promoted by some international cooperation

[B] save

[C] invest

[D] raise

[ B ] vocational

[ C] honorable

[ D] professional