? ? ? Once it was considered good to keep the car engine idling a minute or two following cold starts. Today, with modern technology, the opposite is true. An engine operating under road conditions will warm up faster and run more efficiently than the one that is idling. Idling just burns gas (on average, about a gallon an hour).
When you have a full tank of gas, park the car downhill. This will prevent any gas from coming out of the tank. Parking in areas of less or no sunlight helps prevent 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.
Stay away from wide-track tyres if you want top mileage(汽車耗費1加侖油所行駛的路程). Narrow-track tyres produce less friction and thus less rolling resistance. The same effect is achieved by adding three to five pounds above recommended pressure to each tyre: while this won't noticeably affect your car's sliding quality, it will increase tyre life and gas mileage.
Check tyre pressure often, especially when the weather turns cold. The difference between winter and summer tyre pressure can be as much as eight pounds. This could cost you two miles per gallon.
問題：
1.The main purpose of the passage is to tell us ____.
A.how to drive faster
B.how to drive a car properly
C.how to make a car run smoothly
D.how to make your car consume less gas
【參考答案】D
[考點]主旨大意題
【精析】D 根據(jù)第二段第二、三句“…prevent any gas from coming out of the tank…prevent the gas from steaming…”以及第三段最后一句“…it will increase tyre life and gas mileage.”等都可以看出文章提到最多的就是關(guān)于如何省油的問題，故四個選項中只有D項最符合文章的寫作意圖。
2.According to the passage, keeping the engine running idly ____.
A.will just waste gas
B.will warm it up more quickly
C.will make it work more efficiently
D.is necessary in cold weather
【參考答案】A
[考點]事實細(xì)節(jié)題
【精析】A 根據(jù)第一段最后一句“Idling just burns gas…”可知，空轉(zhuǎn)只會浪費汽油。故選A。
3. Parking your car in a cool place ____.
A.will take it longer to warm up the engine
B.means less gas consumption for the air conditioner
C.prevents any gas from coming out of the tank
D.helps start your car more easily
【參考答案】B
[考點]事實細(xì)節(jié)題
【精析】B 根據(jù)第二段最后一句“Your car will stay cooler, too…”可知，當(dāng)汽車停放在蔭涼處時，車內(nèi)會很涼快，所以會減少因開空調(diào)而消耗的油。故選B。
4. Wide-track tyres____ .
A.won't noticeably affect your car's sliding quality
B.can increase tyre life
C.will increase rolling resistance
D.helps attain top gas mileage
【參考答案】C
[考點]推理判斷題
【精析】C 根據(jù)第三段前兩句可知，想要燃油量少而行駛路程長就應(yīng)該遠離寬齒的輪胎，窄齒的輪胎摩擦力和轉(zhuǎn)動時的阻力都很小。由此可推知，寬齒的輪胎產(chǎn)生的摩擦力和轉(zhuǎn)動時的阻力都很大。故選C。
5.Tyre pressure changes____ .
A.in different weather conditions
B.when narrow-track tyres are used
C.in different road conditions
D.when wide-track tyres are used
【參考答案】A
[考點]推理判斷題
【精析】A 根據(jù)最后一段第二句可知，輪胎壓力在冬天和夏天會有多達8磅的差距。由此可推知，胎壓是隨天氣狀況而改變的。故選A。