2015年职称英语考试卫生类每日一练（第二十五期）

单项选择题
1、 The child's abnormal behavior puzzled the doctor.
A．funny
B．frightening
C．repeated
D．unusual
2、 Last winter, she bought a pair of beautiful boots.
A．gloves
B．shoes
C．trousers
D．sunglasses
3、New Attempts to Eradicate AIDS Virus 
An attempts to Eradicate AIDS Virus high-profile attempt to eradicatethe AIDS virus in a few patients continues to show promise. 
But researchers won’t know for a year or more whether it will work. , scientist David Ho told journalists here Wednesday for the Fourth Conference in Viruses and infections. 
“This is a study that’s in progress,” says Ho, head of the Aaron Diamond AIDS Research Center, New York. 
The study involves 20 people who started combinations of anti-HIV drugs very early in the course of the disease, within 90 days of their infections. They’ve been treated for up to 18 months. Four others have dropped out because of side effects or problems complying with the exacting drug system. 
The drugs have knocked the AIDS virus down to undetectable levels in the blood of all remaining patients. And, in the latest development, scientists have now tested lymph nodes and semen from a few patients and found no virus reproducing there, Ho says. “Bear in mind that undetectable does not equal absent，”He says. 
He has calculated that the drugs should be able to wipe out remaining viruses—at least from known reservoirs throughout the body—in two to three years. But the only way to prove eradication would be to stop the drugs and see if the virus comes back. On Wednesday, Ho said he wouldn’t ask any patient to consider that step before 21/2 years of treatment. 
And he emphasized that he is not urging widespread adoption of such early, aggressive treatment outside of trials. No one knows the long-term risks. 
But other scientists are looking at similar experiments. A federally funded study will put 300 patients on triple-drug treatments and then see if some responding well after six months can continue to suppress the virus on just one or two drugs, says researcher Douglas Richman of the University of California, San Diego. Some patients in that study also may be offered the chance to stop therapy after 18 months or more, he says. 
According to the passage, the attempt to eradicate the AIDS virus 
A．hasn’t been made seriously
B．continues to show promise
C．is appreciated by California University
D．will be successful in two and a half years 
4、 Afterwards there was just a feeling of let-down.
A．excitement
B．anger
C．calm
D．disappointment
5、 She felt that she had done her good deed for the day.
A．homework
B．act
C．justice
D．model
6、 The new government embarked upon a program of radical economic reform.
A．initiated
B．produced
C．adopted
D．implemented
7、回答题。

Electromagnetic Energy

      1. White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.
      2. The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.
      3. Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared ( 红外线的 ) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays ( 紫外线 ) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.
      4. Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.
      5. Until recently, the source of the tremendous amount of energy give off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed ( 利用 ) by man. Chemical energy comes from electron ( 电子 ) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium ( 氦 ) .
      6. Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.
Paragraph 3__________
A．Nuclear reactions as the lasting source of the sun's energy
B．The most important source of energy
C．Types of electromagnetic energy
D．The machines used for energy generation
E．Seeking new sources of energy
F．The use of ultraviolet radiation in medicine
8、 Her story shows how gentle stubbornness and an indifference to honors and fame can lead to great achievements.
A．persuasion
B．determination
C．devotion
D．reservation
9、 The department deferred the decision for six months.
A．put off
B．arrived at
C．abided by
D．protested against
10、 Lack of space forbids further treatment of the topic here.
A．receives
B．deserves
C．prevents
D．accepts