AFP病例两份标本采集时间至少间隔()。
参考答案:24小时
--- Does your cousin work at the police station?
--- No. He’s _______. He works at the TV station.
A.a policeman
B.a bank clerk
C.a reporter
D.a doctor
工程地质及水文地质室内试验项目有()
A.压水试验
B.岩土的物理力学性质试验
C.水质分析
D.模型试验
E.灌浆试验