扩张型心肌病的主要表现是：（）
A.心尖部收缩期杂音
B.心脏扩大，搏动弥漫性减弱
C.第三心音或第四心音
D.心音减弱
E.下肢浮肿
参考答案：B
He is going to build a team that has a lot of potential and he thinks that is excites him.
A．that
B．which
C．what
D．as
最常用的盐析剂是哪种饱和度的硫酸铵（）
A.10％～20％
B.10％～33％
C.33％～50％
D.70％～80％
E.100％
