单项选择题
A.readily accessible
B.securely stowed
C.stored in sealed containers
D.stowed with the emergency provisions
单项选择题 As you hold a piece of manila line vertically in front of you，the strands run from the lower left to the upper right. Which type of line is this?（）
单项选择题 An oxygen indicator can be used to determine if there is（）.
单项选择题 An on-load release system on a survival craft means the cable can be released（）.