根据经济周期和行业分析的相关理论，生活必需品或是必要的公共服务属于（）行业。 A.周

实验探究：

蚯蚓是常见的一种动物。请根据所学知识回答下列问题并完成后面的探究活动。

（1）蚯蚓生活在富含腐殖质的湿润的土壤中，通过________和_________的配合使身体蠕动，昼伏夜出，以植物的枯叶、朽根和其他有机物为食。

（2）探究蚯蚓在玻璃板和粗糙的纸上运动速度的快慢。

①提出的问题是______________________

②作出的假设是：______________________ 

③制定计划：取一条活的蚯蚓放在玻璃板上，观察它的运动，并测量它在2min里蠕动的距离。将这条蚯蚓放在粗糙的纸上，观察它的运动，也测量它在2min里蠕动的距离。如此进行3次，求出蚯蚓在玻璃板和糙纸上各自运动的平均距离。对比结果，得出结论。

④实施计划（按实验计划进行）在观察过程中，你如何保证蚯蚓能正常呼吸？_________

⑤得出结论：________________

如图中PQ为空气和水的界面, 一束光线从空气入射到界面上的O点, 产生了反射和折射, 图中画出了A、B、C的三条光线, 那么光线______是入射光线, 光线______是反射光线, 光线____是折射光线。

公共物品生产的主要方式有（）。

A.政府生产

B.自主生产

C.联合生产

D.合同外包

E.特定的机构和组织生产

阅读理解。

     From the health point of view we are living in an amazing age We are free from many of the most

dangerous diseases. A large number of once deadly illnesses can now be cured by modern medicine.

It is almost certain that one day medicines will be found for the most stubborn remaining diseases.

The expectation of life has increased greatly. But though the possibility of living a long and happy life

is greater than ever before, every day we witness the unbelievable killing of men, women and children

on the roads. Man vs the motor-car! It is a never-ending battle which man is losing. Thousands of

people the world over are killed or horribly killed each year and we are quietly sitting back and letting

it happen.

     It has been rightly said that when a man is sitting behind a steering wheel (方向盘), his car becomes

the extension of his personality. There is no doubt that the motor-car often brings out a man s very

worst qualities. People who are normally quiet and pleasant may become unrecognizable when they are

behind a steering-wheel. They say, they are ill-mannered and aggressive, willful as two-year-olds and

completely selfish. All their hidden angers and disappointments seem to be brought to the surface by the

act of driving.

     The surprising thing is that society smiles so gently on the motorist and seems to forgive his behavior.

Everything is done for his convenience. Cities are allowed to become almost uninhabitable because of

heavy traffic; towns are made ugly by huge car parks; the countryside is ruined by road networks; and

the deaths become nothing more than a number every year, to be easily forgotten.

     It is high time a world rule was created to reduce this senseless waste of human life. With regard to

driving, the laws of some countries are unbelievably lax (不严整) and even the strictest are not strict

enough. A rule which was universally accepted could only have an obviously beneficial effect on the

accident rate. Here are a few examples of some of the things that might be done. The driving test should

be standardized and made far more difficult than it is; all the drivers should be made to take a test every

three years or so; the age at which young people are allowed to drive any vehicle should be raised to at

least 21; all vehicles should be put through strict tests for safety each year. Even the smallest amount of

alcohol in the blood can damage a person's driving ability. Present drinking and driving laws (where they

exist) should be made much stricter. Speed limits should be required on all roads. Governments should

lay down safety specifications for car factories, as has been done in the USA. All advertising stressing

power and performance should be banned. These measures may not sound good enough. But surely

nothing should be considered as too severe if it results in reducing the number of deaths. After all, the

world is for human beings, not motor-cars.

1. What is the main idea of this passage?

A. Traffic accidents are mainly caused by motorists.

B. Thousands of people the world over are killed each year.

C. The laws of some countries about driving are too lax.

D. Only stricter traffic laws can prevent accidents.

2. What does the author think of society toward motorists?

A. Society laughs at the motorists.

B. Huge car parks are built in the cities and towns.

C. Victims of accidents are nothing.

D. Society forgives their rude driving.

3. What does the author mean by saying "his car becomes the extension of his personality" in paragraph 2?

A. Driving can show his hidden qualities.

B. Driving can show the other part of his personality.

C. Driving can bring out his character.

D. Driving can represent his manners.

4. Which of the followings is NOT mentioned as a way against traffic accidents?

A. Build more highways.

B. Stricter driving tests.

C. Test drivers every three years.

D. Raise age limit and lay down safety specifications.

5. The author's attitude towards the traffic situation is _____.

A. positive

B. unsatisfied

C. appealing

D. unclear

对侧单肢感觉缺失（）。

A.大脑皮质

B.脊髓后根

C.脊髓后角

D.前连合

E.内囊