根据英文释义填写适当的单词，单词首字母已给出。（6分）

There are two kinds of physical activity which require special training. The first demands exact careful movements of the muscles（肌肉）. This kind of activity must be strictly controlled because even a slight movement in the wrong direction will lead a mistake. To type quickly, for example, a person needs training; the slightest movement of a finger in the wrong direction may cause a spelling mistake. A dancer who has to dance on the point of her shoes or turn around on one foot must be trained for a long period of time before she can sense her own center and balance herself. You may have seen a girl walking on a rope across an empty space, which, too, requires a lot of practice.

The second kind of physical activity needs greater strength or extra effort. Most of us get tired if we try to run half a mile without stopping, but a specially-trained person can do this without much effort. Three years ago, some scientists carried out experiments, which produced meaningful and unexpected results. They wanted to find out whether a certain amount of physical exercise would injure those suffering from heart problems. They selected some male patients and trained them in continuous bicycle riding. They were surprised to find that the harmful effect of a given amount of physical effort was actually less on the hearts of these trained patients than on those of the patients who were not similarly trained. This is important because it shows that regular physical exercise enables us to make better use of the oxygen（氧气）we breathe in and that this training, in fact, reduces the amount of work our hearts do. Many tasks which are hard for untrained people are not hard at all for trained people.

72．The first kind of physical activity must be strictly controlled because _________.

      A．a mistake in the wrong direction is dangerous to the fingers

       B．a wrong movement in a direction will cause no mistakes

       C．a movement in the wrong direction will cause a mistake

       D．a slight movement of a finger will lead to a mistake

73．What must a dancer do before she can balance herself?

      A．She must dance on the point of her shoes.

       B．She must receive long-time training.

       C．She must turn around on one foot.

       D．She must perform again and again.

74．The experiments done by some scientists showed that ________.

      A．some male patients were asked to ride bicycles regularly in the experiments

       B．the physical exercise had more harmful effect on the hearts of the untrained patients

       C．the physical exercise was harmless to the male patients with heart trouble

       D．the physical exercise could be helpful for the patients to take in more oxygen

75．What would be the best title for this text?

      A．Training Our Bodies      B．Physical Activities

       C．Movement Training       D．Extra Body Effort

Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.

The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.

Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety－five would have the same effect.

Some scientists have suggested setting a noise limit of one hundred and twenty decibels in the oceans. They have observed that noises at that level can frighten and confuse whales（鲸鱼）.

A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.

The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales' ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected(被感染的).

Many researchers whose work depends on ocean sounds are against a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.

Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists don’t think that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.

36．According to the passage, which of the following is increasingly dangerous to sea creatures?

A. The sound of cars.

B. The sound of voices.

C. Man-made noise pollution.

D. The sound of steps.

37．According to the passage, natural sounds include all of the following EXCEPT________.

A. sounds made by animals themselves               B. ocean drilling

C. underwater earthquakes                                D. the breaking of ice fields

38．Which of the following is discussed in the third paragraph?

A. The same noise level produces a different effect on land and in the ocean.

B. Different places may have different types of noises.

C. The decibel is not a right unit (单位) for measuring underwater noise.

D. Different ocean animals may have different reactions to noises.

39． Which of the following is true of whales?  

A. They won't be confused by noises.

B. They are deaf to noises.

C. Their ability to reproduce will be lowered by high-level noises.

D. Their hearing will be damaged by high-level noises.

40．According to the passage, what will scientists most probably do in the future?

A. They will work hard to reduce ocean noise pollution.

B. They will protect animals from harmful noises.

C. They will try to set a limit of 120 decibels.

D. They will study the effect of ocean noise pollution.

---Mary knocked into a tree last night while driving, but she is all right.

---She is lucky. She          herself badly.

A. should injure                                               B. might injure

C. should have injured                                        D. could have injured

Nobel, who was born in Stockholm, is a great scientist famous for his dangerous experiments.
Nobel studied in the USA and then Russia between 1850 and 1859. After his return, he started researching into bombs. As is known, bomb is dangerous to life, but Nobel was working under that condition. Once a big explosion in his lab completely destroyed the lab and caused some deaths. After that he had to experiment on a boat in a lake. He received criticism and satire(讽刺), but he proceeded with the work rather than losing heart. From 1860s to 1880s, Nobel made many achievements and his inventions were first used in building roads and digging tunnels. Most of the bombs were safer and more possible to be controlled. Even at the end of the 20th century, we still used his methods.
Nobel had many patents in Britain and other European countries. He was quick to see industrial openings(机会) for his scientific inventions and built up over 80 companies in 20 different countries. Indeed his greatness lay in his outstanding ability to combine the qualities of an original scientist with those of a forward­looking industrialist.
But Nobel’s main concern was never with making money or even with making scientific discoveries. Seldom happy, he was always searching for a meaning to life, and from his youth, he had taken a serious interest in literature and philosophy. His greatest wish, however, was to see an end to wars, and thus peace between nations, and he spent much time and money working for this cause. To follow his will, a fund was set up to encourage people to make great progress in physics, chemistry, physiology(生理学), medicine, literature and peace. That’s the Nobel Prize which means great honor to a scientist.
【小题1】Through his early experimental work, it is evident that ________.