【单选题】Tom studied hard .He wanted to ________ of the good chance to learn .
【判断题】发动机活塞气环的主要作用是密封、导热,因此一般活塞上只有一道气环、两道以上油环。
【单选题】发动机外围系统装配,风扇与护风罩间隙均匀无干涉现象,风扇叶外露护风罩
【判断题】Pele's family was rich when he was young.
【单选题】灵长目动物体型最大的为大猩猩,体重在( )公斤以上;最小的矮狐猴体重仅有( )克。
【简答题】A.He wanted to make himself well known. B.He wanted to be put in prison again. C.He needed the money to support his family. D.He hated the barber there.
【判断题】活塞气环的主要作用是密封、导热,因此,一般活塞上只有一道气环,两道以上油环。