釉质呈淡黄色的原因是由于（）。 A.釉质钙化不良 B.釉质缺损 C.釉质本身的颜色
题型：单项选择题
问题：
釉质呈淡黄色的原因是由于（）。
A.釉质钙化不良
B.釉质缺损
C.釉质本身的颜色
D.因釉质钙化程度高而不能透过牙本质的颜色
E.因釉质钙化程度高而透过的牙本质颜色
题型：单项选择题
阅读理解
Doctors say anger can be an very harmful emotion(情绪)unless you learn how to deal with it. They
warn that angry feelings can lead to heart disease, stomach problems, headaches, emotional problems
and possibly cancer.
Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a
calm reasonable way. Others burst with anger, losing control of themselves. But other people repress
their anger. They cannot or will not express it.
For years many doctors thought that repressing anger was more dangerous to a person's health than
expressing it. They said that when a person is angry, the brain gives off the same hormones(激素)that
are produced during tense situations. They speed the heart rate, raise blood pressure, or sugar into the
blood and narrow the blood vessels(脉管)to the interstices(空隙). In general, the person feels excited
and ready to act.
Doctors said that repressing these feelings only makes the feelings continue. And this can lead to
many medical problems. Doctors thought a person could prevent these problems by letting the anger out
by expressing it freely. But recently some doctors held a different view. They said that people who
express anger repeatedly and violently did become, in fact, more and not less angry.They said this, too,
can cause medical problems.
Some doctors say that both repressing and expressing anger can be dangerous. They believe that
those who express anger violently may be more likely to develop heart disease, and they believe that
those who keep their anger inside may face a greater danger of high blood pressure.
Doctors say the solution(解决办法)is learning how to deal with anger. They say the first step is to
admit that you are angry and to recognize the real cause of the anger, and then decide if the cause is
serious. If it is, they say: "Do not express your anger while angry. Wait until your anger has cooled down
and you are able to express yourself calmly and reasonably. "
1. What does the phrase" repress anger" mean in Paragraph 2?
A. Forget one's anger.
B. Express one's anger openly.
C. Treat one's anger calmly and reasonably.
D. Keep one's anger inside.
2. When you get angry, which of the following should you do for the good of health?
A. Repressing the anger.
B. Expressing the anger.
C. Learning how to make a deal.
D. Treating the anger properly.
3. What is the central topic of this passage about?
A. The different ways of dealing with anger.
B. The dangers of anger and the solution.
C. New medical discoveries.
D. The argument between the new and old views about anger.