单项选择题
A.a conditional
B.an absolute
C.a considerable
D.a substantial
单项选择题 If you came into contact with nitrobenzene while disconnecting the cargo hose，you should be aware that it is（）.
单项选择题 If a void occurs in the cargo hold，it is better to（）to control the broken stowage.
单项选择题 If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.