题目内容
（请给出正确答案）
A.above
B. at
C. over
D. withi
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更多“Before replacing a piston you …”相关的问题
Before replacing a piston you should check that all rings are ___.
A.free
B.fastened
C.broken
D.stuck
A.above
B.at
C.over
D.withi
A.deflection
B.discrepancy
C.error
D.tolerance
Although we all depend on the resources of nature for our survival, _______.
A．industrial products are replacing all our natural resources
B．it is only on islands that nature survives
C．we have forgotten what our original countryside looked like
D．we have allowed large areas of countryside to be spoilt by industrial development
Passage 2 In the past two years, millions of Americans have suddenly taken an interest in the bicycle as if it were a startling new invention. Annual bike sales doubled between 1960 and 1970, and there are nearly 70 million bikes in the United States today. That’s more than two for every three automobiles. Of course, the bike has been around for more than 150 years, and this isn’t America’s first bicycle boom(兴旺). A wave of bike enthusiasm swept the land in the late 1800s and bicycle production hit two million units in 1897. Then with the coming of the auto, bicycling declined, and for decades remained popular only with children and a few adults. Now, national concern with air pollution and physical fitness has brought the bike back to the forefront ― particularly with adults. More than eight million bikes were sold in the United States last year and a third of them went to adults. The year before, only 15 percent of new bike sales were for adults. 36. In the United States, the bicycle is______.
A、A. becoming popular again
B、B. creating traffic problems
C、C. popular chiefly with children
D、D. replacing the family car
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Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Exercise is beneficial to your heart. A 22-year study was conducted by doctors in(26)California. They(27)found that people who work at physical lobs experience fewer heart attacks than other people. The active people work all the time at moderated speeds. Their daily routine gives them an adequate amount of exercise and helps them stay in shape. (28)However, machines that Call do heavy labor more speedily are replacing this type of work.
(27)
A．In Africa.
B．In Chicago.
C．In Washington.
D．In California.
Task 2
Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45.
Fliers may want to have their tickets in hand before catching their planes, but the airline companies are doing everything they can to bring forward cost-saving ticketless flight —no paper needed, just a ticket number and a photo ID.
Anyone who buys a Northwest E-ticket through the airline's computer service by June 16 will get an award. Next time you fly, you can buy another ticket for a friend for $ 99,good anywhere in the US or Canada through February, along with the lowest ticket prices.Some airlines offer extra frequent-flier miles for the ticketless crowd. And there are rising punishments for paper lovers. American, Northwest, United, and US Airways have raised the cost for lost-ticket replacement to $ 70 from either $ 60 or $ 50 last week. The airlines insist that the increase in price is not meant to push travelers toward E-tickets but only covers the increasing cost of replacing and tracking a missing ticket.
Why is the new ticketless flight introduced？
A．It is cheaper for air travelers.
B．It helps reduce the cost for airlines.
C．It can use computer to plan air traveling.
D．It helps prevent fliers from losing their tickets.
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Exercise is beneficial to your heart. A 22 - year study was conducted by doctors in California. They found that people who work at physical jobs experience fewer heart attacks than other people. The active people work all the time at moderated speeds. Their daily rountine gives them an adequate amount of exercise and helps them stay in shape. However, machines that can do heavy labor more speedily are replacing this type of work.
(27)
A．In Africa.
B．In Chicago.
C．In Washington.
D．In California.
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