男，52岁，既往史不详，突然发生呼吸困难，满肺哮鸣音，心率120次／分，心脏听不清有

上市公司董事与董事会会议决议事项所涉及的企业有关联关系的，不得对该项决议行使表决权，也不得代理其他董事行使表决权。该董事会会议由( )的无关联关系董事出席即可举行，董事会会议所作决议须经无关联关系董事过半数通过。

A．1/3

B．过半数

C．2/3

D．全体

读图1中的甲、乙两幅图，完成问题。

小题1:与图乙比较，图甲

A．比例尺较大，表示的范围较大

B．比例尺较小，表示的范围较小

C．比例尺较小，表示的范围较大

D．比例尺较大，表示的范围较小小题2:B城市位于A城市的

A．西南方向

B．东南方向

C．西北方向

D．东北方向小题3:图乙中的国家是世界上洪涝多发区之一，造成这一现象的自然原因是

①年降水量大，降水变率大            ②季风气候，降水集中

③地势低平，排水不畅                ④植被破坏严重，生态功能减弱

A．①②③

B．②③④

C．①②④

D．①③④

阅读理解。

     The science of physics today is as current as the morning newspaper. Indeed, as a result of new advances

in physics and their rapid application to inventions designed to satisfy man' s wants, the world itself has been

changing rapidly. Space technology, industrial technology, and the technology of the home, the farm, the office,

the bank, and the department store have all been revolutionized.

     Clearly, every grown-up today would understand the world he lives in much better if he knew something

about physics. Whether it is Congress voting huge sums of money for new warships, space exploration, or

atomic energy, the office staff learning to use a new computer, son Bobby wanting to know about going to

the moon or the housewife learning to operate a new electric stove, physics seems to be everywhere.

     Teachers in thousands of schoolrooms in America are trying to communicate some of the excitement and

importance of these new developments to their students. They know that some of their eager students will

someday be scientists and will themselves then contribute to the development of new knowledge or its

application to new things.

     But in any case, they can be sure that if they bring a knowledge of science (any science) to their students in

meaningful and interesting ways, they have contributed much to helping each one live a more meaningful life.

1. The application of new advances in physics to inventions ____.

A. may solve all the problems in teaching

B. can help people understand the meaning of life

C. is intended to meet people's needs

D. makes people communicate easier without face to face  

2. According to the passage, many American teachers are making efforts to do all of the following

    EXCEPT ____.

A. arousing(激起) their students' interest in physics

B. making their students understand the importance of physics

C. giving their students the information of new advances in science

D. creating excitement about their new inventions among their students

3. The word "themselves" in the third paragraph refers to ____.

A. some American teachers

B. some of the eager students

C. the new developments

D. the scientists in physics

4. The first two paragraphs of the passage mainly tell us ____.

A. new advances in physics can result in new inventions

B. physics is widely used in our life

C. the world has been changing rapidly

D. space and industrial technology have all been revolutionized

短路的类型有哪几种？

物质对X线的总衰减系数包括（）

A.光电衰减系数

B.相干散射衰减系数

C.康普顿衰减系数

D.电子对效应衰减系数

E.以上都是