单项选择题
A.increased appetite and thirst B.decreased appetite and thirst C.gain in weight D.elevated temperature
Storage batteries should be charged in a well ventilate...
单项选择题Storage batteries should be charged in a well ventilated area because（）.
A.they generate heat B.they emit hydrogen C.of the toxic fumes they emit D.they recharge faster in a well ventilated space
Since electrical burn victims may be in shock，the FIRST...
单项选择题Since electrical burn victims may be in shock，the FIRST medical response is to check for（）
A.indication of broken bones B.breathing and heartbeat C.symptoms of concussion D.bleeding injuries
Since accumulations of H2S gas on a ship can be dangero...
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（）.
A.lighter than air B.heavier than air C.a yellow gas that is easily recognized D.mildly toxic
