皮部有树脂状分泌物,红褐色或黑棕色,与木部相间排列成偏心性半圆形环的药材是()
A.大血藤
B.苏木
C.沉香
D.川木通
E.鸡血藤
参考答案:E
—Hey, you are wanted on the phone.
—_________ I’m coming.
A.So what?
B.Hold on a minute.
C.You guessed it.
D.What a shame!
正常人的暗适应时间为()
A.16~20分钟
B.10~15分钟
C.6~8分钟
D.1~2小时
E.<5分钟