分主一身左右之阴阳的经脉是（）
A.冲脉
B.任脉
C.督脉
D.阴阳维脉
E.阴阳跷脉
参考答案：E
______ the story is short and there are no new words in it, it is difficult to understand. [ ]
A. But
B. Though
C. And
D. For
