航空运输的优势之一即是安全、准确，航空公司的运输管理制度也比较完善，货物的破损率较低。
参考答案：对
My father moved to Hainan in _____, when he was in ______.
A．the early 1990s; his thirties
B．early 1990s; his thirties
C．the early 1990’s; his thirty
D．early 1990’s; his thirty
当2.1MPa/min泄压时将停运下列设备和关闭下列阀门？
