单项选择题
A.increased appetite and thirst
B.decreased appetite and thirst
C.gain in weight
D.elevated temperature
单项选择题 Storage batteries should be charged in a well ventilated area because（）.
单项选择题 Since electrical burn victims may be in shock，the FIRST medical response is to check for（）
单项选择题 Since accumulations of H2S gas on a ship can be dangerous to personnel，it is important to know that H2S gas is（）.