________ too much exposure to wind may cause ...

________ too much exposure to wind may cause the dryness of skin, so too much exposure to the sun may result in cancer.

a. Just as             b. While          c. If                d. Now that

高二英语单项填空简单题查看答案及解析

Smoking too much may ________ lung cancer and cause other diseases.

高二英语单项填空简单题查看答案及解析

Stress is one of the most common causes of health problems in modern life. Too much stress results in physical, emotional, and mental health problems.

There are numerous physical effects of stress. Stress can affect the heart. It can increase the pulse rate, make the heart miss beats, and can cause high blood pressure. Stress can affect the respiratory (呼吸的) system. It can lead to asthma and cause a person to breathe too fast, resulting in a loss of important carbon dioxide. Stress can affect the stomach. It can cause stomachaches and problems of digesting food. These are only a few examples of the wide range of illnesses and symptoms resulting from stress.

Emotions are also easily affected by stress. People suffering from stress often feel anxious. They may have panic attacks and feel tired all the time. When people are under stress, they often overreact to little problems. For example, a normally gentle parent under a lot of stress at work may yell at a child for dropping a glass of juice. Stress can make people angry, moody, or nervous.

Long-term stress can lead to a variety of serious mental illnesses. Depression, an extreme feeling of sadness and hopelessness, can be the result of continued and increasing stress. Alcoholism and other addictions often develop as a result of overuse of alcohol or drugs to try to relieve（释放）stress. If stress is allowed to continue, then one’s mental health is put at risk.

It is obvious that stress is a serious problem. It attacks the body. It affects the emotions. Untreated, it may eventually result in mental illness. Stress has a great influence on the health, our feelings and our minds. So, reduce stress: stop the world and rest for a while.

1.What physical effects does stress result in?

A.Overreacting to little problems.

B.Making blood pressure low.

C.Suffering from depression.

D.Increasing the pulse rate.

2.Which one belongs to the emotional problem?

A.Alcohol abuse.

B.Drug addiction.

C.MuchAnxiety.

D.Heartbeat missing.

3.What does the fourth paragraph mainly talk about?

A.Stress causing mental problems.

B.Stress causing physical problems.

C.Stress causing emotional problems.

D.Stress causing panic attacks.

高二英语阅读理解中等难度题查看答案及解析

Studies show the electronic devices people have made much use of ________ music may be causing hearing loss in many people.

A. enjoy　　 B. to enjoy

C. enjoying　　 D. enjoyed

高二英语单项填空中等难度题查看答案及解析

Eating too much fat can _______ heart disease and cause high blood pressure.

Which of the following is not correct?

A. lead to　　　　　　 B. result from

C. contribute to　　 D. bring about

高二英语单项填空中等难度题查看答案及解析

Long-time exposure to air pollution can lead to physical changes in the brain and cause trouble in learning and memory, and even anxiety. This is suggested by the results of new research on mice.

While other studies have shown the harmful effects of polluted air in the lungs and heart, this is the first to show the negative effect on the brain.

The team of Laura Fonken, Randy Nelson, from the Ohio State University, USA, has spread to the brain a previous line of research which found that fine particulate (微粒) matter floating in the air mainly because of air pollution caused by humans, causes swelling in much of the body, and may be related to high blood pressure problems, and some other diseases.

In the research Fonken and his colleagues exposed mice to polluted air for six hours each day, five days a week, over a period of 10 months, almost half the average life length of mice.

Polluted air contains fine particles created by cars, factories and natural dust. Fine particles of this kind are tiny, about 2.5 micrometers in diameter, or about one-thirtieth the width of a human hair. These particles can go deep into lungs and other organs.

The concentration of this particulate material to which they exposed mice is equal to the concentration at which people can be exposed in some polluted urban areas.

After a period of 10 months, the researchers got the animals to have a series of behavioral tests. Both the behavior of mice and the results of neurological(神经的) tests done to them show that those within the polluted air had more problems in learning and memory, and higher levels of anxiety.

The results suggest that long-time exposure to polluted air can have measurable negative effects on the human brain and can cause a variety of mental health problems. This could have important consequences for those living and working in polluted urban areas.

1.The results of new research on mice first suggest that polluted air mainly does harm to ________.

A. normal organs                    B. lungs and heart

C. mental health                    D. blood pressure

2.The bad effects of tiny particles in polluted air are those except ________.

A. high blood pressure problems

B. making human hair thinner

C. different kinds of diseases

D. swelling in much of the body

3.From the last sentence we can infer that people living in polluted urban areas ________.

A. are likely to suffer from mental problems

B. can measure the negative effect on them

C. show little concern for air pollution

D. can be exposed to polluted air longer

4.Which of the following is the best title for the passage?

A. Long-time Exposure to Air Pollution

B. Evidence and Concern of Air Pollution

C. Measurable Effect on Human Brain

D. Mental Problems Caused by Air Pollution

高二英语阅读理解中等难度题查看答案及解析

Wind power is an ancient source of energy ________we may return in the near future.

A. on which         B. to which          C. by which          D. from which

高二英语单项填空简单题查看答案及解析

Mr. Smith, may I have a word with you? I’ll try not to __________ too much of your time．

高二英语单项填空简单题查看答案及解析

The photo on _____ cover of the book may cause _____offence to some people.

A．the; an           B．the, the           C．不填，the         D．the, 不填

高二英语单项填空中等难度题查看答案及解析

Doctors warn people that one may develop skin cancer with his skin ________ to the sun too much.

高二英语单项填空简单题查看答案及解析