可使肥厚型梗阻性心肌病心脏杂音减弱的药物是（）
A.硝酸甘油
B.地高辛
C.异丙肾上腺素
D.亚硝酸异戊酯
E.普萘洛尔
参考答案：E
---Grandpa, what did the doctor say?
---He advised me to live_______ the air is fresher.
A．in where
B．in which
C．the place where
D．where
静力压桩有什么特点？适用哪些范围？
