快开门式压力容器
参考答案：
指进出容器通道的端盖或封头和主体间带有相互嵌套的快速密封锁紧装置的容器。
—You have a nice watch.
—Thank you. I _____ it since I got married. [ ]
A. had
B. bought
C. have had
D. have bought
利率互换是交易双方在一定时期内交换( )。
A．利率B．本金C．负债D．利息
