单项选择题
If you came into contact with nitrobenzene while disconnecting the cargo hose，you should be aware that it is（）.
A.highly toxic when absorbed through the skin B.a blood poison C.a nerve poison D.All of the above
单项选择题 If the patient vomits during mouth-to mouth resuscitation，the rescuer should FIRST（）.
单项选择题 If a crewman suffers a second-degree burn on the arm，you should（）.
单项选择题 If a crew member is exposed to phenol by way of skin or eye contact，you should IMMEDIATELY（）.
