被称为“阴脉之海”的是（）。
A.阴跷脉
B.督脉
C.冲脉
D.任脉
E.阴维脉
参考答案：D
“精密量取，时应选用的计量器具是
A．量筒
B．称量瓶
C．分析天平
D．移液管
E．量杯
. ______ was done by the girl students.
A．One three of the work
B．One third of the works
C．Two third of the works
D．Two thirds of the work
