泌尿系肿瘤血尿特点是（）

A.全程肉眼血尿

B.终末血尿伴尿频

C.初始血尿

D.镜下血尿

E.血红蛋白尿

Friendship helps us understand ______ we are, ______ we need each other and ______ we can do for each other.

A. what
when
that
B. who
why
what
C. where
why
that
D. who
when
how much