下述脉象中主痛证的是()。
A.涩脉
B.代脉
C.弦脉
D.紧脉
E.迟脉
参考答案:B, C, D
He often stands against the fence and talks endlessly with my father _____ gardening problems.
A.to
B.too
C.about
D.off
缺氧的概念是()
A.血液氧含量过低
B.血液氧容量降低
C.吸入气体氧分压降低
D.血液氧饱和度降低
E.供氧不足或用氧障碍