The most common symptom associated with bladder cancer is

A. burning on urination.
B. frequent infections.
C. painless hematuria.
D. decreasing urine output.

Excel中，当某单元格出现一串“#”符号时，说明此单元格内的数字（）。

A.格式不对

B.位数太长

C.非法

D.无法判定