电液调压阀的作用是()。
A.给液压站压力
B.控制油缸内油压
C.卸荷
D.充油
参考答案:B
For breakfast he only drinks juice from fresh fruit ________ on his own farm.
A.grown
B.being grown
C.to be grown
D.to grow
月经周期提前,经量多或少,色红,质稠,见于()
A.肝郁化热证
B.肾阴虚证
C.二者均对
D.二者均不对