【单选题】【消耗次数：1】
制动过程中，汽车前轮左右制动力不相等时，将产生制动_________。
①
跑偏
②
侧滑
③
失稳
④
发热
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相关题目
【简答题】
绘图说明汽车在制动过程中地面制动力、制动器制动力及附着力之间的关系。
【判断题】
汽车在制动过程中，当制动器制动力大于轮胎－道路附着力时，车轮就会抱死滑移。只有汽车具有足够的制动器制动力，同时地面又能提供较大的附着力时，汽车才能获得较好的制动效果。
①
正确
②
错误
【单选题】
前后轮制动器制动力具有固定比值的汽车制动时，若前轮先抱死，在后轮没有抱死前，随着制动踏板里的进一步增加，后轮地面制动力会_________。
①
增大
②
减少
③
先增大在减少
④
先减少在增大
随机题目
【单选题】
14.The thief fell to the ground，his left foot ____and blood ____down from his mouth.
①
breaking; running
②
broken; running
③
breaking; run
④
broken; run
【单选题】
18.- Did you get a dictionary?- No, I _____, but there were not any _____.
①
tried; to be left
②
had tried to; leaving
③
tried to; left
④
had tried; have left
【单选题】
4.____the diamond, he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
12.You can’t imagine what great trouble they have ____the problem____.
①
to solve; being talked about
②
solving; discussing
③
to solve; to talk about
④
solving; being discussed
【单选题】
6.And there, almost____in the big chair, sat her little brother, who never had to be told to keep quiet.
①
having lost
②
losing
③
to be lost
④
lost
【单选题】
17.____, the subject was always in my mind.
①
Walking or sleeping
②
Walking or slept
③
Having walked or slept
④
To walk and sleep
【单选题】
20. The joke told by Tom made us_____, so our maths teacher couldn’t make himself _____.
①
to laugh; hearing
②
laughing, heard
③
laughing; hear
④
laughed; heard
【单选题】
15.The program was so exciting that the children kept their eyes ____on the screen.
①
to fix
②
to be fixed
③
fixed
④
fixing
【单选题】
10.In January, 2004, the United States successfully launched “spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
①
it marked
②
marking
③
marked
④
to mark
【单选题】
19. When he came to, he found himself _____ on a chair, with his hands _____ back.
①
to sit; tying
②
sitting; tying
③
seating; tied
④
seated; tied