在液压传动的基本工作原理中，液体中各点的压力在各个方向上（）.
A、有时大
B、有时小
C、有时相等
D、总是相等
参考答案：D
下列诗句中，描述气候的是
A．小楼一夜听春雨
B．昨夜西风过园林
C．东边日出西边雨
D．清明时节雨纷纷
he met with the difficulty did he realize the importance of our help. [ ]
A. Even though
B. Never did
C. Only when
D. Ever since
