问题 单项选择题 A1/A2型题

千伏表接在电路中,以下描述错误的是()

A.千伏表间接表示管电压的高低

B.曝光时不得调节千伏旋钮以防出现高压电涌

C.先调节管电流再调节管电压以做必要的补偿

D.千伏表接在高压次级电路中

E.千伏表应在X线允许规格范围内调节

答案

参考答案:D

解析:千伏表接在高压初级电路中,是预置值,不是次级管电压的直接读数。

单项选择题
阅读理解

D

The rising costs of health care have become a problem for many countries in the world. To deal with this problem, it is recommended that a big part of the government's health budget be used for health education and disease prevention instead of treatment. Actually, many kinds of diseases are preventable in many ways and preventing a disease is usually much cheaper than treating it. For example, people could avoid catching a cold if they dressed warmly when the weather starts getting cold. But many people get sick because they fail to do so, and have to spend money seeing a doctor.

Daily habits like eating more healthy food would have kept millions of families from becoming bankrupt if the patients had taken measures for early prevention. For instance, keeping a balanced diet, such as not consuming too much animal fat and insuring a steady intake of vegetables and fruits, seems to be quite important.

One very effective and costless way of prevention is regular exercise, which is necessary for a healthy mind and body. Regular exercise, such as running, walking, and playing sports is a good way to make people feel better or reduce stress.

In addition, health education plays a key role in improving people's health. By giving people more information about health, countries could help people understand the importance of disease prevention and ways to achieve it. For example, knowing one's family medical history is an effective way to help keep healthy. Information about health problems among close relatives will make them aware of what they should do to prevent certain diseases through lifestyle changes, which will work before it is too late.

However, stressing disease prevention does not mean medical treatment is unimportant. After all, prevention and treatment are just two different means toward the same effect. In conclusion, we could save money on health care and treat patients more successfully if our country spends more money on health prevention and education.

67.What’s the best title of the passage?

A.Prevention or Education?    B.Prevention or Treatment?

C.Health or Illness?            D.Exercise or Illness?

68.Which of the following can replace the underlined word “bankrupt’’?

A.Unable to be cured        B.Unable to pay one’s debts

C.Stronger than ever before  D.More successful than ever before

69.We learn from the passage that       .

A.dressing warmly can prevent diseases

B.a balanced diet is cheaper than regular exercise

C.the more health education, the better

D.the government’s health budget should be increased

70.Which of the following shows the structure of the passage?

CP (Central Point)  P (Point)        Sp (Sub-point次要点)          C (Conclusion)