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【单选题】
The main purpose of the passage is（）.
A．to tell us how expert drivers try to save gas
B．to tell us how to drive a car properly
C．to tell us how to make a car run smoothly
D．to tell us how to make your car consume less gas
A.
Once it was considered good to keep the car engine idle a minute or two following cold stars. Today, with modern technology, the opposite is true. An engine operating under road conditions will warm up faster and run more efficiently than one that is idling. Idling just burns gas (on average, about a gallon an hour).
B.
When you have a full tank of gas, park the car facing downhill is possible: this will pr any gas from coming out of the tank. Parking in areas of less or no sunlight helps pr the gas from steaming that would occur if you parked in the hot sun. Your car will stay cooler, too, and that means less gas consuming work for the air conditioner once the engine is started.
C.
Stay away from wide-track tires if you want top mileage (耗油1升行驶的英里里程). Narrow-track tires produce less friction and thus rolling resistance. The same effect is achieved by adding three to five pounds above recommended pressure to each tire; while this won’t noticeably affect your car’s sliding quality, it will increase tire life and gas mileage.
D.
Check tire pressure often, especially when the weather turns cold. The difference between winter and summer tire pressure can be as much as eight pounds. This could cost you two miles per gallon.
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【单选题】尽管受到雪灾、居民消费价格总水平及原材料、能源价格上涨等不利因素的影响，但2008年国内车市依然健康：一季度生产汽车251.79万辆，同比增长14.83%；一季度累计销售257.89万辆，同比增长21.42%。其中轿车销量达到137.42万辆，同比增长22.52%，说明市场自身的拉动作用非常强劲。 国内汽车市场的持续快速增长，与国民经济的总体快速发展是相吻合的。根据国家统计局公布的一季度国民经济运...
A.
因此从部分重点企业汽车企业的经营情况来看，其收入水平与利润均不容乐观
B.
但汽车需求保持了稳定增长，使企业能够较好地抵御成本上涨的压力
C.
这导致成本成为制约汽车企业发展最关键的因素
D.
但汽车市场局面复杂，成本因素的影响往往是潜在的
【单选题】Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (31) on the i...
A.
immune
B.
resistant
C.
sensitive
D.
subject
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【单选题】尽管受到雪灾、居民消费价格总水平及原材料、能源价格上涨等不利因素的影响，但2008年国内车市依然健康：一季度生产汽车251.79万辆，同比增长14.83%；一季度累计销售257.89万辆，同比增长21.42%。其中轿车销量达到137.42万辆，同比增长22.52%，说明市场自身的拉动作用非常强劲。 国内汽车市场的持续快速增长，与国民经济的总体快速发展是相吻合的。根据国家统计局公布的一季度国民经济运...
A.
因此从部分重点企业汽车企业的经营情况来看，其收入水平与利润均不容乐观
B.
但汽车需求保持了稳定增长，使企业能够较好地抵御成本上涨的压力
C.
这导致成本成为制约汽车企业发展最关键的因素
D.
但汽车市场局面复杂，成本因素的影响往往是潜在的
【单选题】Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (31) on the i...
A.
immune
B.
resistant
C.
sensitive
D.
subject
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