----Have you ever ______Lintong to see the Terra Cotta Warriors?

----Yes, I have.

A．went to

B．gone to

C．been in

D．been to

血尿的诊断标准是尿离子沉渣镜检，每个高倍视野发现红细胞()

A．1个

B．持续多次1～2个

C．5个以上

D．3个以上

E．持续多次2～3个