单项选择题
A.initially connect the compressed air nozzle to the inflation tube
B.pull the inflation lanyard
C.connect the hand pump to the inflation tube and pump it up
D.connect the helium nozzle to the inflation tube
单项选择题 The worst atmospheric condition for dispersion of H2S is（）.
单项选择题 The person assigned to command a lifeboat or inflatable liferaft on a ship shall have a list of the persons assigned to the lifeboat or liferaft. The list shall include each person’s（）.
单项选择题 The operating cord on an inflatable liferaft also serves as a（）.