更多"Which of the following has been use"的相关试题:
[单项选择]Which of the following has been used only recently to advertise vacancies
A. Newspapers.
B. Recruitment agencies.
C. Internet.
[填空题]PVA has been used in Australia for many years.
[填空题]Ultroviolet light has long been used in water-treatment plants to help with virus killing. As long as the water is clear enough not to absorb the rays, (36) it to a discharge lamp will destroy the DNA of viruses and (37) that could otherwise cause illness when (38) . Now a group of researchers have developed an industrial-scale solar-driven purification system that removes not only bugs but also chemical (39)
The first of their (40) has been built as demonstration project. The researchers wanted to clean the water that they use to cool their (41) engines. This cooling water (42) gets contaminated both with rocket fuel and with (43) produced by the burning of the fuel.
The trick the researchers use to boost the cleansing action of ultraviolet is to add a light-activated catalyst(催化剂) to the waste water. (44) . After a complex series of reactions, water gets pure enough to be
[简答题]Though it has been used in China to treat pain for thousands of years, acupuncture still makes many doctors uneasy, especially in the West. 1. The treatment is based on the idea that needles inserted at specific points can correct a pain-producing imbalance in two bodily forces—the yin and the yang. Dr. Bruce Pomeranz, a University of Toronto neurophysiologist, has a different explanation: acupucture may stimulate the release of the body’s own natural painkillers—endorphins—which act something like morphine (吗啡).
Seven years ago social worker Gwenn Chriss was told she had lupus (狼疮). Once able to swim a mile, she could barely swim across the pool. She tried all sorts of pills, but her pain only got worse.
Desperate, she went to an acupuncturist who inserted about a dozen stainless steel needles at points on her legs, arms and ears. Slowly, Chriss began to recover. Within six months she was swimming again.
2. The U. S.
[单项选择]Which of the following has been proved to transmit HIV
A. Tears.
B. Breast milk.
C. Saliva.
D. Nervous system tissue.
[单项选择]
Which city or cities has the woman been to
A. New Orleans.
B. San Francisco,
C. Both New Orleans and San Francisco,
D. Neither of the two cities.
[填空题]The industrial age has been the only period of human history in which most people’s work has taken the form of jobs. The industrial age may now be coming to an end, and some of the changes in work (36) which it brought may have to be reversed. This seems a (37) thought. But, in fact, it could offer the (38) of a better future for work. Universal employment, as its history shows, has not meant economic freedom.
Employment became (39) when the enclosures of the 17th and 18th centuries made many people dependent on paid work by depriving them of the use of the land, and thus of the means to provide a living for themselves. Then the factory system destroyed the cottage industries and (40) work from people’s homes. Later, as transport improved, first by rail and then by road. people commuted longer distances to their places of employment until, (41) , many people’s work lost all connection with their home lives and the
