液压缸采用差动连接时,若使两个方向的运动速度相等,则活塞杆与活塞直径之间的关系是( )
A. d=0.5D
B. d=2/3D
C. d=D
D. d=0.707D
查看答案
推力越大,液压缸的速度越大,即v=F/A 。
A. 对
B. 错
TASK B: Choose the correct responses.Who’s Shawn
A. The middle-aged man on the couch
B. That’s right
Where is Samantha
A. She couldn’t make it
B. I’d like to meet her
Is Avery the one wearing glasses?
A. That’s right
B. She’s running late