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Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. Mark wants to travel by air.
B. Mark likes the CEO very much.
C. Mark is greatly interested in power.
D. Mark can seize opportunities in time.

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Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. The man thinks ear racing is too exciting to miss.
B. The man prefers dog racing to horse or car racing.
C. The woman prefers horse racing to dog or car racing.
D. The woman dislikes dogs and cars.

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Section BPassage One Unlike the scientist, the engineer is not free to select the problem which interests him；he must solve the problems as they arise, and his solutions must satisfy conflicting requirements. Typically, the engineering solution to most problems must take into account many factors. To the engineer, efficiency means output divided by input. His job is to secure a maximum output for a given input or to secure a given output with a minimum input. The ratio may be expressed in terms of energy, materials, money, time, or man. Most commonly the denominator (分母) is money；in fact, most engineering problems are answered ultimately in dollars and cents. The emphasis on efficiency leads to the large, complex operations which are characteristic of engineering. The processing of the new antibiotic and vaccines in the test-tube stage belongs in the field of biochemistry, but when great quantities must be produced at low cost, it becomes an engineering problem. It is the desire for efficiency and economy that distinguishes ceramic engineering from the work of the potter, textile engineering from weaving, and agricultural engineering from farming. Since output equals input minus losses, the engineer must keep losses and waste to a minimum. One way is to develop uses for products which otherwise would be waste. The work of the chemical engineer in utilizing successively greater fractions of raw materials such as crude oil is well known. Losses due to friction occur in every machine and in every organization. Efficient functioning depends on good design, careful attention to operating difficulties, and lubrication of rough spots, whether they are mechanical or personal. The raw materials with which engineers work are seldom found in useful forms. Engineering of the highest type is required to conceive, design, and achieve the conversion of the energy of a turbulent mountain stream into the powerful torque(转矩) of an electric motor a hundred miles away. Similarly many engineering operations are required to change the sands of the seashore into the precise lenses which permit us to observe the minute bacteria in a drop of water and study a giant mass of stars in outer space. According to the passage, the processing of the new antibiotic and vaccines becomes an engineering problem when ______.

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Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. She likes riding horses.
B. She has been promoted once a year.
C. She won the second place in a contest.
D. She is very excited.

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Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. The government should help those youngsters.
B. The government should take the place of those youngsters.
C. The government should encourage those youngsters.
D. The government should place restrictions on those youngsters.

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Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. Mark wants to travel by air. B. Mark likes the CEO very much. C. Mark is greatly interested in power. D. Mark can seize opportunities in time.

Section AQuestions 11 to 18 are based on the conversation you have just heard.

Section AQuestions 11 to 18 are based on the conversation you have just heard.

Section AQuestions 11 to 18 are based on the conversation you have just heard.

A. Mark wants to travel by air.
B. Mark likes the CEO very much.
C. Mark is greatly interested in power.
D. Mark can seize opportunities in time.