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根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多途选项。
Laser(激光)is short for Light Amplification by Stimulated Emission of Radiation.Laser light is different from daylight or electric lights.Industry put lasers to work almost immediately after they were invented in nineteen sixty. 1 .
The first medical operation using a laser took place the year following its invention.Doctors Charles Campbell and Charles Koester used a laser to remove a tumor from a patient's eye at Columbia-Presbyterian Hospital in New York City. 2 .
Lasers have made measurement an exact science.Astronomers have used lasers to measure the moon's distance from Earth. 3 .For example, drawing a perfectly level straight line on a construction site is easy using a laser.
4 .And the jewelry industry uses lasers to write on the surface of the world's hardest substance, diamonds.
Lasers are found in many products used almost everywhere.Over one hundred years ago, writers imagined that beams of light could be powerful weapons.Today, lasers guide missiles and bombs.American defense companies are working on giant laser guns recognizable to science fiction fans everywhere. 5 .
Scientific American magazine says huge lasers turn only about twenty to thirty percent of the energy they use into a laser beam.The rest is lost as heat.
That has not stopped scientists from working to perfect powerful lasers that, one day, may be able to shoot missiles out of the sky.
A.But weapons were not the first to use it on the list.
B.All lasers have several things in common.
C.Mappers and builders use laser technology every day.
D.But there are technological difficulties.
E.Lasers have also changed the way we communicate.
F.Manufacturers have used lasers for years to cut and join metal parts.
G.Since then, doctors have used lasers to cut and remove tissue safely with little risk of infections.
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China’s position on the World Trade Organization(WTO) issue has not changed, Foreign Ministry spokeswoman Zhang Qiyue said yesterday at a routine press briefing.
However, the atmosphere surrounding the WTO accession talks has been spoiled by NATO’S bombing of the Chinese Embassy in Belgrade (贝尔格莱德), he added.
Zhang stressed the US - led NATO bombing of the Chinese Embassy in Yugoslavia had aroused the strong indignation of the Chinese people, and put Sino - U. S. relations into difficult straits. (困境)
The bombing incident has affected the atmosphere surrounding the two sides’ negotiation on the WTO accession, he said China demanded prompt, adequate and effective compensation(赔偿) for the Chinese loss of lives, injuries and loss of property.
Shen Guofang, China’s acting permanent representative to the United Nations, said on Wednesday that “Kosovo is Part of the Federal Republic of Yugoslavia, and it is not the United Nation’s trustee territory”.
Shen, who took the floor at an international conference on Kosovo as the senior representative of Chinese Foreign Minister TangJiaxuan, called on the international community to respect the sovereignty (国家主权)and territorial integrity (领土完整)of Yugoslavia.
Which of the following statements is right according to the passage?
A. China’s view point on the entry to WTO has changed little.
B. The atmosphere surrounding the WTO accession talks was not at all influenced by NATO’S bombing.
C. The U.S. - led NATO must answer for all the loss caused by the bombing incident.
D. It is reasonable for the strong countries to control the weak countries.
“Take the floor”in the last paragraph means to“________”.
A. make a speech
B. occupy the floor
C. make use of the place
D. attend the meeting
Which of the following statements is NOT right?
A. The U. S - led NATO bombing of the Chinese Embassy in Yugoslavia made us very angry
B. Sino- U. S. relation got into trouble as a result of the bombing.
C. It’s wrong to stich one’s nose into the home affairs of other countries.
D. The U. S. - led NATO would like to compensate the loss caused by the bombing of the Chinese Embassy.
We can draw a conclusion from the passage that ________ in the world’s foreign affairs.
A. all the countries should always have their sovereignty respected
B. we should help other countries for our own purpose
C. the sovereignty and territorial integrity of all the countries must be greatly respected and be put in the first place
D. there always exists respect for sovereignty and territorial integrity of all
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