动脉硬化病人可出现( )
A．绌脉B．丝脉C．洪脉D．间歇脉E．弦脉
参考答案：E
How thoughtful of him ______ to make all the necessary arrangements for us!
A．he is
B．it was
C．is he
D．was he
制冷剂R12有何特点？
