题目内容

13.通常用来制造键的材料是__________。

A. 低碳钢
B. 中碳钢
C. 高碳钢
D. 合金钢

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14．设计普通平键联接时，根据__________来选择键的长度尺寸。

A. 传递的转矩
B. 传递的功率
C. 轴的直径
D. 轮毂长度

Dictation:Write down the English of the following terms

I like ________ a lot, and my mother usuallycooks it in different ways.

A. fish
B. butter
C. potatoes
D. noodles

— ________ yogurt do you need?— Three cups.

A. How long
B. How far
C. How many
D. How much