在按FOB吊钩下交货的术语成交时,其货物风险转移是( )。
A.以装运港吊钩下为界
B.以装运港船舷为界
C.以装运港船上为界
D.以装运港码头为界
参考答案:B
Congratulations! It seemed that our boss was __________ with your work today.[ ]
A. dishonest
B. confused
C. satisfied
D. disturbed
请简述绝对压强、相对压强、真空度的定义。