铲运机铲土的施工方法中，助铲法一般每( )台铲运机配l台推土_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

铲运机铲土的施工方法中，助铲法一般每( )台铲运机配l台推土机助铲。

A．2～3
B．3～4
C．3～5
D．2～4

答案

参考答案：B

选择题

Nowadays, children are ________ too many violent online games, which is bad for the development of their characters.

A．defeated by

B．limited to

C．handled by

D．exposed to

单项选择题

以下哪个设备用于存储用户信息？（）

A.GGSN

B.HLR

C.MFS

D.DNS