— How much is this T-shirt?

— ___________________[ ]

A. It's thirty yuan.

B. Fine, thank you.

应用流式细胞术检查尿液标本，急性泌尿系感染的指标变化，正确的是

A．WBC＞1.0/ml，且Fsc强而F1弱

B．WBC≥10/ml，低Fsc和高F

C．WBC≥10/ml，低Fsc和低F

D．WBC≥10/ml，高Fsc和高F

E．WBC<10/ml，且Fsc强而Fl弱