心室内压最低是在
A．等容收缩期 B．快速射血期 C．缓慢射血期 D．等容舒张期 E．快速充盈期
参考答案：D
My interests include football, bowling and surfing the web________studying my favorite subjects.[ ]
A. instead of
B. as well as
C. less than
D. rather than
长途电话网的基本结构有以下3种：①直达式；②辐射式；③迂回式。
