单项选择题
A. commodity B. consignment C. conveyance D. commission
A. smoking reduces the oxygen carrying capacity of his blood B. smoking and drinking make him malnourished C. the problem of deficient oxygen supply and malnourishment act synergistically D. it’s the normal metabolism
A. Because it may act as a dissolving agent B. Because he is malnourished C. Because the liver can’t dispose of alcohol D. Because the liver has to clean the toxins