舒张期震颤发于

A．胸骨右缘第2肋间

B．胸骨左缘第2肋间

C．胸骨左缘第3、4肋间

D．心尖部

E．胸骨左缘第2肋间及其附近

A: I’d like to place a person-to-person call to Chicago. The number is 932—8647, but I don’t know the area code.
B: ().

A. Sorry. I can’t tell you.

B. What’s the name of the party you’re calling

C. this is operator speaking.

D. OK. Here you are.