Rotation of the steering wheel on the navigation bridge initiates oil pressure being applied to the steering gear rams by （）.
A. regulating the oil flow with the six-way valve
B. moving the automatic differential valve
C. moving the receiving tele-motor which regulates the two-way valve
D. varying the angle of a tilting box or eccentricity of a floating ring
AT用（）信道来告知AN其在前向业务信道上请求的传输速率以及前向业务信道上所选择的服务扇区。
2000毫升液体要求10小时内匀速输完，滴速应该是（）
A. 30滴/min
B. 40滴/min
C. 50滴/min
D. 55滴/min
E. 60滴/mi
战略分析是战略工作的唯一工具，是对企业所处的外部环境和企业自身条件的优劣势所作的分析。
A. 正确
B. 错误
微信支付 
支付宝支付