督脉的主要生理功能是()
A.总督一身之阴经
B.总督一身之阳经
C.分主一身左右之阴阳
D.约束诸经
E.调节十二经气血
参考答案：B
Recent studies have shown that most US graduates receive cash as gifts, though the amount received _____
from person to person. [ ]
A. prefers
B. promotes
C. varies
D. suffers
乳突气房开始发育的时间（）
A.出生时
B.半岁
C.１岁
D.２岁
E.４岁
