题目内容

You’d better ______ at home and ______ your homework.

A. to stay, do
B. stay, do
C. to stay, to do
D. stay, to do

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I can't catch up with the fashion,because the clothes style_______ allthe time.

A. has changed
B. is changed
C. is changing
D. changed

John is always ready ______ others.

A. help
B. helping
C. helps
D. to help

辊压机按物料通过压辊时的运动位置分为 和 。

卧式辊压机的特点是面带在辊压过程中呈水平直线运动状态。()

A. 对
B. 错

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