正常瞳孔等大、圆形，在自然光线直径为（），直接、间接对光反应灵敏。

【真题试题】(2009年单项选择题第22题)乙公司欠甲公司30万元，同时甲公司须在2008年10月20日清偿对乙公司的20万元货款。甲公司在同年10月18日与丙公司签订书面协议，转让其对乙公司的30万元债权。同年10月24日，乙公司接到甲公司关于转让债权的通知后，便主张20万元的抵销权。下列表述中，正确的是（ ）。

A．甲公司与丙公司之间的债权转让合同于1o月24日生效

B．乙公司接到债权转让通知后，即负有向丙公司清偿30万元的义务

C．乙公司于10月18日取得20万元的抵销权

D．丙公司就30万元债务的清偿，有权要求甲公司和乙公司承担连带责任

企业为应对火灾、爆炸、疾病等紧急情况，需要（）。

A．开展本行业业务技术培训

B．制定紧急应对工作程序

C．保护现场并等待有关人员处理

D．实施紧急情况模拟演练

阅读理解。

     Scientists who try to predict earthquakes have gotten some new helpers recently-animals.

     That's right, animals. Scientists have begun to understand what farmers have known for thousands of years.

Animals often seem to know in advance that an earthquake is coming, and they show their fear by acting in

strange ways. Before a Chinese quake in 1975, snakes awoke from their winter sleep early only to freeze to

death in the cold air. Cows broke their halters (缰绳) and tried to escape. Chickens refused to enter their cage.

All of this unusual behavior, as well as physical changes in the earth, warned Chinese scientists of the coming

quake. They moved people away from the danger zone saved thousands of lives.

     One task for scientists today is to learn exactly which types of animal behavior predict quakes. It's not an

easy job. First of all, not every animal reacts to the danger of an earthquake. Just before a California quake in

1977, for example, an Arabian horse became very nervous and tried to break out of his enclosure. The

Australian horse next to him, however, remained perfectly calm. It's also difficult at times to tell the difference

between normal animal restlessness and "earthquake nerves." A zoo keeper once called earthquake researchers,

saying that his cougar had been acting strangely. It turned out that the cat had an upset stomach.

     A second task for scientists is to find out exactly what kinds of warnings the animals receive. They know

that animals sense far more of the world than humans do. Many animals can see, hear, and smell things that

people do not even notice. Some can sense tiny changes in air pressure, gravity, or the magnetism of earth.

This extra sense probably helps animals predict earthquakes.

     A good example of this occurred with a group of dogs. They were shut in an area that was being shaken

by a series of tiny earthquakes. (Several small quakes often come before or after a large one.) Before each

quake a low booming sound was heard. Each boom caused the dogs to bark wildly. Then the dogs began to

bark during a silent period. A scientist who was recording quakes looked at his machine. It was acting as

though there were a loud noise too. The scientist realized that the dogs had reacted to booming noise. They

also sensed the tiny quake that followed it. The machine recorded both, though humans felt and heard nothing.

     In this case there was a machine to monitor what the dogs were sensing. Many times, however, our

machines record nothing extraordinary, even though animals know a quake is coming. The animals might be

sensing something we measure but do not recognize as a warning. Discovering what animals sense, and

learning how they know it is a danger signal, is a job for future scientists.

1. Through the passage the writer hopes to explore ____.

A. why animals send a danger signal before an earthquake

B. how animals know when an earthquake is coming

C. why animals not humans have a good sense of danger

D. how much animals know about an earthquake

2. During an earthquake in China in 1975, ____.

A. chickens refused to go out of their cage

B. snakes were frozen to death in their caves

C. snakes awoke from their winter sleep earlier

D. cows broke their halters and escaped from their sheds

3. Which of the following is one of earthquake nerves according to the passage?

A. An Arabian horse tried to escape from his enclosure.

B. A cougar had an upset stomach unexpectedly.

C. An Australian horse was perfectly calm.

D. A cat acted very strangely in a zoo.

4. The scientists did an experiment with a group of dogs to ____.

A. find out that the machine could record unusual happenings

B. compare the reactions of animals and those of humans

C. prove that animals could sense more than humans

D. find out what exact warnings animals send

急性梗阻化脓性胆管炎的诊断必须具备腹痛、寒战高热、黄疸、休克、神经精神障碍。

我国的证券投资分析师行业自律性组织是( )。

A．中国证监会证券投资分析师协会

B．中国总工会证券投资分析师协会

C．中国金融学会证券投资分析师专业委员会

D．中国证券业协会证券投资分析师委员会