问题 单项选择题

蝶窦的自然开口位于()

A.蝶窦下壁外侧的翼突根部

B.蝶窦外侧壁的下部

C.蝶窦外侧壁的上部

D.蝶窦前壁上方近鼻中隔处

E.蝶窦后壁上方近鼻中隔处

答案

参考答案:D

单项选择题
阅读理解

阅读理解。

     Most people feel lonely sometimes, but it usually only lasts between a few minutes and a few hours. This

kind of loneliness is not serious. In fact, it is quite normal. For some people, though, loneliness can last for

years. Now researchers say there are three different types of loneliness.

     The first kind of loneliness is temporary (暂时的). This is the most common type. It usually disappears

quickly and does not require any special attention. The second kind, situational loneliness, is a natural result

of a particular situation-for example, a family problem, the death of a loved one, or moving to a new place.

Although this kind of loneliness can cause physical problems, such as headaches and sleeplessness, it usually

does not last for more than a year. The third kind of loneliness is the most severe. Unlike the second type,

chronic (长期的) loneliness usually lasts more than two years and has no specific cause. People who

experience habitual loneliness have problems socializing and becoming close to others. Unfortunately, many

chronically lonely people think there is little or nothing they can do to improve their condition.

     Psychologists are trying to find ways to help habitually lonely people for two reasons: they are unhappy

and unable to socialize and there is a connection between chronic loneliness and serious illness such as heart

disease. While temporary and situational loneliness can be a normal, healthy part of life, chronic loneliness can

be a very sad, and sometimes dangerous condition.

1. How would you treat temporary loneliness according to the passage?

A. Talk to friends.

B. Just ignore it.

C. Go to see a doctor.

D. Ask your teachers for guidance.

2. "It" in the last sentence of the second paragraph refers to _____.

A. temporary loneliness

B. situational loneliness

C. a new place

D. sleeplessness

3. The topic of the 4 paragraph is that_______.

A. one problem of loneliness is a person's social contacts

B. we depend on various people for different reasons

C. lonely people don't have many social problems

D. lonely people don't have many friends

4. Why do psychologists want to help chronically lonely people?

A. Chronic loneliness can cause family problems.

B. Chronic loneliness can cause serious illness.

C. Chronic loneliness can not be overcome.

D. Such people are harmful to society.

5. What is the best title for the passage?

A. Three kinds of loneliness

B. Loneliness and Diseases

C. Loneliness and Social Contacts

D. Chronic Loneliness