淋病的临床特征有()
A.外阴黏膜出现成群水庖
B.潜伏7~12天
C.可查到梅毒螺旋体
D. * * 口溢脓,涂片镜检可查到革兰氏阴性双球菌
E.早期外阴部出现疳疮
参考答案:B, D
-- Do you think the rain will stop tomorrow? -
-- . It has rained for four days. It's too wet everywhere.
A.I hope not
B.I don't think so
C.Don't worry
D.I hope so
观测场内仪器之间要保持一定距离,以利于空气流通。25米×25米规格的观测场,南北、东西间距应当不小于()米。
A、3
B、4
C、2
D、5