下面哪种血尿应考虑为上尿路结石（）
A.终末血尿
B.活动后血尿
C.无痛性血尿
D.初期血尿
E.血尿伴血块
参考答案：B
下列离子在水溶液中能大量共存的是[ ]
A．H+、K+、HCO3-、Ca2+
B．OH-、Na+、Mg2+、HCO3-
C．Na+、H+、Cl-、NO3-
D．Na+、SiO32-、H+、Cl-
Great changes ______ in my hometown in the past few years.[ ]
A. were taken place
B. took place
C. have been taken place
D. have taken place
