单项选择题
A.wash the burned area with a warm soap and water solution
B.flood，bathe，or immerse the burned area in cold water
C.cover the burned area with talcum powder and bandag it cover the burned area with talcum powder and bandage it tightly
D.leave the burned area exposed to the atmosphere
单项选择题 The device that allows a floating ship to sway without bending the marine riser system is the（）.
单项选择题 The depth over a shallow patch，（）about 1．5 miles southeastward of Nanshan Tou lighthouse，reduces to 8 meters.
单项选择题 The danger associated with using carbon dioxide in an enclosed space is（）.