问题 问答题 简答题

驱动桥的基本功用?

答案

参考答案:

增大由传动轴或直接由变速器传来的转矩,将转矩分配给左、右驱动车轮,并使左、右驱动车轮具有汽车行驶运动学所要求的差速功能,同时,承受作用于路面和车架或车厢之间的铅锤力、纵向力和横向力。

阅读理解

阅读理解。

      Peter works in a food shop. He helps the shopkeeper (店主). He puts food on the shelves (架子) every day.

Then people come into the shop and buy the food. Today there aren't any bags of rice on the shelf. "Peter," says

the shopkeeper. "We need some bags of rice. Bring some rice to the shelf. Hurry up!"

      Peter runs to get some bags of rice. They're in another room and they are on the top of the shelf. The shelf

is high up (高). Peter is tall, but he can't reach (够到) the bags. He brings two boxes and puts one box on top of

the other. Then he stands on them. Now he can reach the bags on the shelf.

      The shopkeeper is coming. He is calling Peter.

      "Peter! Hurry up! What are you doing? Where are the bags of rice?" he says, he opens the door. He can't see Peter on the boxes.

      "Don't open the door!" Peter says. Then Peter falls down (跌倒)!

      Now Peter is on the floor. There is some rice on his head.

1. Peter helps the shopkeeper _______. [ ]

A. sell food sometimes

B. carry bags of oranges

C. in a food shop

D. buy some rice today

2. People come to the shop for _______. [ ]

A. the vegetables

B. food

C. the bikes

D. the fruit

3. Peter runs to another room to get some bags of rice because _______.[ ]

A. his father asks him to carry some

B. the shopkeeper wants to cook the meal

C. the shelves are full of rice

D. the shelves for rice are empty

4. The bags are _______. [ ]

A. easy to reach for Peter

B. too high for Peter to reach

C. on top of the boxes

D. very heavy

5. Peter falls down because _______. [ ]

A. he is on the boxes behind the door and the boss pushes the door

B. the bags fall down

C. the shopkeeper is calling him

D. there's some rice on his head

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