题目内容

数控机床对主传动系统的要求：、、宽调速。

查看答案

搜索结果不匹配？点我反馈

更多问题

One of the best_ of the 2Oth century is the mobile phone.

A. invents
B. inventions
C. inventors
D. invests

The_news is that China is holding the biggest trade fair in the world in 2015.

A. latest
B. ultimate
C. final
D. last

Our products_ from quite cheap to very expensive.

A. rang
B. vary
C. choose
D. range

The _ of our raw material varies from year to year.

A. sauce
B. source
C. stuff
D. suit