使瞳孔缩小的因素有()
A．肾上腺素
B．视近物
C．副交感神经兴奋
D．阿托品
E．有机磷农药
参考答案：B, C, E
When they awoke the next morning, they were surprised to find a ___ of fog floating in the air. [ ]
A. cover
B. blanket
C. piece
D. mixture
天南星质佳者要求（）
A.个小
B.个大
C.断面色白
D.断面色棕
E.断面粉性足
