或然损失风险是指火灾、风灾或其他偶然发生的自然灾害引起的置业投资损失。防范该风险的最

治疗癫痫持续状态的有效药物是（）

A.苯妥英钠

B.地西泮

C.苯巴比妥

D.异戊巴比妥

E.奋乃静

阅读下列材料，然后回答问题．

物理学中把具有流动性的液体和气体统称为流体．当流体处于流动状态时，其内部各处的压强有什么规律呢？

小明同学将如图甲所示的玻璃管装置按到水流稳定的自来水管上，当水在玻璃管中流

动时，可看到两个竖直管中液面的高度并不相同．从图中可以看出在A、B两处管的粗细不同，因而A处流速小，B处流速大，可见流体的压强与流速之间有着一定的关系．

接着，小明又自制了一个飞机机翼模型（如图），将其固定在托盘测力计上，在机翼模型的正前方用电扇迎面吹风，来模拟飞机飞行时的气流，比较机翼上下方气流压强的大小，进一步验证了上面的关系．

（1）由图甲所示的实验，可以得出流体的压强与流速之间有什么关系？答：　                　

（2）在图乙所示的实验中，电扇转动后，托盘测力计的示数发牛了什么变化？答：　           　

（3）下列四种情形中，哪几种情形能够运上述的实验规律进行解释　      　．

A．乒乓球运动员拉出的弧圈球能急速旋转而下沉

B．将氢气球放手后，它会漂向空中

C．直升飞机能够停在空中一定高度处

D．船舶航行时应避免两艘靠近的船并排前进

A person may have an idea about himself that will prevent him from doing good work..

He may have the idea that he is not capable of it. It is easy to get such an idea even though there is no justification for it. A child may think he is stupid because he does not understand how to take the most of his mental faculties, or he may accept another person s mistaken estimate of his ability. Older people may be handicapped by the mistaken belief that they are incapable of learning anything new because of their age.

A person who believes that he is incapable will not make a real effort, because he feels that it would be useless. He won’t go at a job with the confidence necessary for success, and he won’t work hardest, even though he may think he is doing so. He is therefore likely to fail, and the failure will strengthen his belief in his incompetence.

Alfred Adler, a famous psychiatrist（精神病医生）, had an experience which illustrates this. When he was a small boy he got off to a poor start in arithmetic. His teacher got the idea that he had no ability in arithmetic, and told his parents what she thought in order that they would not expect too much of him. In this way, they too developed the idea, "Isn’t it too bad that Alfred can’t do arithmetic?" He accepted their mistaken estimate of his ability, felt that it was useless to try, and was very poor at arithmetic, just as they expected.

One day he became very angry at the teacher and other students because they laughed when he said he saw how to do a problem which none of the other students had been able to solve.

Adler succeeded in solving a problem. This gave him confidence. He rejected the idea that he couldn’t do arithmetic and was determined to show them that he could. His anger and his new found confidence stimulated him to be at arithmetic problems with a new spirit. He now worked with interest, determination, and purpose, and he soon became extraordinarily good at arithmetic. He not only proved that he could do arithmetic, but he learned early in life from his own experience that , if a person goes at a job with determination and purpose, he may astonish himself as well as others by his ability.

This experience made him realize that many people have more ability than they think they have. And that lack of success is as often the result of lack of knowledge of how to apply one’s ability, lack of confidence, and lack of determination as it is the result of lack of ability.

小题1:The underlined word “justification” most probably means ________.

A．reason

B．rightness

C．need

D．demand小题2:What is the main idea of this passage?

A．The basic principles in doing math problems.

B．Our idea about ourselves may have a negative influence on our work.

C．Our ideas do not always have and influence on us.

D．All actions are caused by impulse.小题3:What does Alfred Adler’s story tell us?

A．Many people have more ability than they think they have.

B．Anybody can become a mathematician, if he has determination.

C．Arithmetic is actually very easy.

D．Most teachers are wrong when they evaluator their students.小题4:Why did he become angry one day?

A．Because the teacher and other students laughed at him.

B．Because they challenged him to do a difficult arithmetic problem.

C．Because he couldn’t solve the arithmetic problem.

D．Because he was very poor at arithmetic.小题5:What idea did Alfred’s teacher have?

A．He was slow in arithmetic.

B．He should work harder.

C．He should be transferred to a special school.

D．He should not tell his parents that he was slow.

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A．公平
B．平等
C．自愿
D．诚实信用