离心泵振动大时伴有（）现象。
A、排量波动
B、声音异常
C、温度升高
D、泵效提高
参考答案：B
肾病综合征最根本的病理生理变化是
A．大量蛋白尿
B．高度水肿
C．低蛋白血症
D．血尿
E．高脂血症
As is known to us, knowledge is can change your life.
A．that
B．what
C．which
D．how
