足三阳经的原穴是（）
A.解溪、丘墟、昆仑
B.冲阳、足临泣、光明
C.丘墟、冲阳、京骨
D.解溪、足临泣、京骨
E.陷谷、阳辅、束骨
参考答案：C
心脏的血液主要通过冠状窦、右室前静脉、心最小静脉回流至心腔。
When ____about his family, he is always refusing to answer.
A．asked
B．asking
C．being asked
D．mentioned
