One’s life has value _______ one brings value to the life of others.

A．so that

B．no matter how

C．as long as

D．except that

双侧输尿管结石引起的肾功能衰竭是

A．肾前性肾功能衰竭
B．肾后性肾功能衰竭
C．肾性肾功能衰竭
D．以上都是
E．以上都不是