问题
单项选择题
下列关于液压传动的基本参数,错误的是()。
A.液压传动压力取决于负载,负载大压力就大,负载小压力就小
B.按照压力分级情况,15MPa压力属于高压
C.速度取决于流量,进入活塞缸的流量越大,活塞运动的速度也就越大
D.在液压传动中,功率等于压力与流量的乘积
答案
参考答案:B
下列关于液压传动的基本参数,错误的是()。
A.液压传动压力取决于负载,负载大压力就大,负载小压力就小
B.按照压力分级情况,15MPa压力属于高压
C.速度取决于流量,进入活塞缸的流量越大,活塞运动的速度也就越大
D.在液压传动中,功率等于压力与流量的乘积
参考答案:B
What conclusion can you make about the elite universities in the US
A.Prospects for female faculty in these institutions are dim.
B.Some less talented female doctorates feel their prospects as staff in these institutions are dim.
C.None of these institutions like female doctorates to join them.
D.Female doctorates will be the lowest in status in these institutions.