单项选择题
Cargo that gives off fumes that may contaminate other cargo is known as a(n) （）.
A.delicate cargo B.dirty cargo C.toxic cargo D.odorous cargo
单项选择题 Blood flowing from a cut artery appears（）.
单项选择题 Bleeding from a vein may be ordinarily controlled by（）.
单项选择题 Bleeding from a vein is（）.
