-- Bob, please go and buy some vegetables for me. I’m busy now.

-- Can you be more ________， mum?

-- Some tomatoes and a cabbage.

A．specific

B．firm

C．abstract

D．complete

单纯性血尿临床表现为（）

A.复发性血尿

B.良性家族性血尿

C.重型血尿

D.轻型血尿

E.持续性血尿