阴经是指（）
A.六脏的经脉
B.六腑的经脉
C.督、带脉
D.循行胸腹经脉
E.循行背部经脉
参考答案：A
As is well known, everyone is forbidden ________ in buses, regardless of what they are.[ ]
A．to smoke
B．smoking
C．to be smoking
D．to smoking
汽封块安装时应注意什么？
