Bacterial DNA is stabilized by histone proteins.

A、in the nutrient broth plus ampicillin, but not in the broth containing tetracycline.

B、only in the broth containing both antibiotics.

C、in the broth containing tetracycline, but not in the broth containing ampicillin.

D、in all four types of broth.

In general, our society is becoming one of giant enterprises directed by a bureaucratic management in which man becomes a small, well-oiled cog in the machinery. The oiling is done with higher wages, Nell-ventilated factories and piped music, and by psychologists and “human-relations” experts; yet all this oiling does not alter the fact that man has become powerless, that he is bored with it. In fact, the blue and the white-collar workers have become economic puppets who dance to the tune of automated machines and bureaucratic management.

The worker and employee are anxious, not only because they might find themselves out of a job; they are anxious also because they are unable to acquire any real satisfaction of interesting life. They live and die without ever having confronted the fundamental realities of human existence as emotionally and intellectually independent and productive human beings.

Those higher up on the social ladder are no less anxious. Their lives are no less empty than those of their subordinates. They are even more insecure in some respects. They are in a highly competitive race. To be promoted or to fall behind is not a matter of salary but even more a matter of self-respect. When they apply for their first job, they are tested for intelligence as well as for the right mixture of submissiveness and independence. From the moment on they are tested again and again-by the psychologists, for whom testing is a big business, and by their superiors, who judge their behavior, sociability, capacity to get along, etc. This constant need to prove that one is as good as or better than one ’s fellow-competitor creates constant anxiety and stress, the very causes of unhappiness and illness.

Am I suggesting that we should return to the preindustrial mode of production or to nineteenth-century “free enterprise” capitalism？ Certainly not.Problems the never solved by returning to a stage which one has already outgrown. I suggest transforming our social system form, a bureaucratically managed industrialism in which maxima, production and consumption are ends in themselves, into a humanist industrialism in which man and full development of his potentialities-those of all love and of reason-are the aims of social arrangements. Production and consumption should serve only as means to this end and should be prevented from ruling man.

By “a well-oiled cog in the machinery ” the author intends to deliver the idea that man is ____.

A.a necessary part of the society though each individual ’s function is negligible

B.working in complete harmony with the rest of the society

C.an unimportant part in comparison with the rest of the society

D.a humble component of the society, especially when working smoothly

The real cause of the anxiety of the workers and employees is that ____.A.they are likely to lose their jobs

B.they have no genuine satisfaction or interest in life

C.they are faced with the fundamental realities of human existence

D.they are deprived of their individuality and independence

From the passage we can conclude that real happiness of life belongs to those ____.A.who are at the bottom of the society

B.who are higher up in their social status

C.who prove better than their fellow-competitors

D.who could dip fir away from this competitive world

To solve the present social problems the author puts forward a suggestion that we should ____.A.resort to the production mode of our ancestors

B.offer higher wages to the workers and employees

C.enable man to fully develop his potentialities

D.take the fundamental realities for granted

The author’s attitude towards industrialism might best be summarized as one of ____.A.approval

B.dissatisfaction

C.suspicion

D.susceptibility

A、Optic nerve

B、Trochlear nerve

C、Trigeminal nerve

D、Vestibulocochlear nerve

阅读理解I teach economics at Harvard (哈佛大学) three times per week. Last Monday, at the beginning of class, I cheerfully asked my students how their weekend had been. One young man said that his weekend had not been so good. He had his wisdom teeth (智齿) removed. The young man then asked me why I always seemed to be so cheerful. His question reminded me of something I’d read somewhere before: “Every morning when you get up, you have a choice about how you want to approach life that day, ” I said. “I choose to be cheerful.”“Let me give you an example.”I continued. “In addition to teaching here, I also teach out at the community college, 17 miles down the freeway from where I live. A few weeks ago I drove 17 miles to that college. I left the freeway and turned onto College Drive. I only had to drive another quarter mile down the road to the college. But just then my car died. I tried to start it again, but the engine wouldn’t turn over. So I put my flashers (闪光灯) on, grabbed my books, and ran to the college.”“As soon as I got there I arranged for a tow truck (拖车) to meet me at my car after class. The secretary in the office asked me what has happened.‘This is my lucky day,’ I replied, smiling.”“Your car breaks down and today is your lucky day？”She was puzzled. “What do you mean？” “I live 17 miles from here,”I replied. “My car could have broken down anywhere along the freeway. It didn’t.it broke down in the perfect place: off the freeway, within walking distance of here. I’m still able to teach my class, and I’ve been able to arrange for the tow truck to meet me after class. If my car was meant to break down today, it couldn’t have been arranged in a more convenient way. ”secretary’s eyes opened wide, and then she smiled. I smiled back and headed for class.”the sixty faces in my economics class. Despite the early hour, no one seemed to be asleep.Somehow, my story had touched them. Or maybe it wasn’t the story at all. In fact, it had all started with a student’s observation that I was cheerful.

1. Why did the young man in the class feel sad on his weekend？

A. Because he was ill in bed all day long.

B. Because his car broke down on the way to hospital.

C. Because he had his wisdom teeth pulled out.

D. Because he had an accident on the way.

2. Which of the following is NOT mentioned as the reason why the author still felt lucky after his car broke down？

A. His car broke down in the perfect place.

B. He met a very helpful secretary in school.

C.He has been able to arrange for the tow truck after class.

D. He's still been able to teach his class without being late.

3. How did the secretary feel when she heard the author's explanation？

A. Surprised and approving.

B. Worried and nervous.

C. Happy and excited.

D.Disappointed and angry.

4. How did the students feel after they heard the author's story？

A. They were bored.

B. They were excited.

C. They were impatient.

D. They were moved.

5. Which is the best word to describe the author？

A. Open

B. Optimistic

C. Pessimistic

D. Alert

A、anterior

B、posterior

C、dorsal

D、ventral

E、segment