多尿是指24小时尿量多于（）
A.1500ml
B.2000ml
C.2500ml
D.3000ml
E.3500ml
参考答案：C
（﹣x﹣y）（x+y）=（ ）．
—What are you going to do tomorrow?
—Sorry , . [ ]
A. Please tell me
B. Thank you
C. I think
D. I don't know
