什么是可行性研究?
参考答案:
可行性研究是对拟建项目在工程技术、经济及社会、环境保护等方面的可行性和合理性进行的研究。
Mr. Black lent (借出) as much money as possible to his friends _____ he wasn't very rich. [ ]
A. as
B. though
C. since
D. because
诊断宫内早孕最可靠的辅助检查方法是()
A.尿妊娠试验
B.基础体温测定
C.B型超声检查
D. * * 脱落细胞学检查
E.宫颈黏液涂片干燥后镜检