手厥阴心包经与阴维脉交通的穴位是（）。
A.劳宫
B.内关
C.外关
D.大陵
E.列缺
参考答案：B
Helen always helps her mother even though going to work ____ most of her day.
[ ]
A. takes up
B. makes up
C. saves up
D. puts up
CD3+、CD8+是指下列何种细胞的标志物( )
A．总T细胞B．辅助性T细胞C．细胞毒性T细胞D．NK细胞E．B细胞
