引起瞳孔散大的毒物是()
A.有机磷农药
B.毒蕈
C.阿托品
D.吗啡
E.安定
参考答案:C
A number of students in our class _______ League Members, and the number ________39. [ ]
A. is, is
B. are, are
C. are, is
D. is, are
支付系统的行号由()定长字符组成。
A.12位
B.11位
C.10位
D.13位