循行“环阴器”的经脉是（）。
A.足太阴脾经
B.足阳明胃经
C.足太阳膀胱经
D.足厥阴肝经
E.足少阳胆经
参考答案：D
— Could you please do some shopping for me, Mary?
— Sorry, I ______ my homework.
A．do
B．am doing
C．have done
D．was doing
氧气站平面布置有哪些要求？
