Students in China always have ________ h

Those farmers who _________ move from place to place with their animals in the past have moved into

new houses at last.[ ]

A. could

B. might

C. would

D. should

数据流程图是用于软件需求分析的工具，下列元素 Ⅰ．数据流 Ⅱ．加工 Ⅲ．数据存储 Ⅳ．外部实体 ( )是其基本元素。

A．Ⅰ、Ⅱ、Ⅲ

B．Ⅰ和Ⅲ

C．全部

D．Ⅰ、Ⅲ和Ⅳ

简述用齿轮铣刀铣蜗杆的特点？

简述先秦诸子散文的主要著作及重要特点

简述接户线导线的检修项目和标准？