无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

<strong id="pbjma"><li id="pbjma"></li></strong>

<dl id="pbjma"></dl>

單項選擇題

A fifteen-pound CO₂ extinguisher（）.

A.contains 15 pounds of CO₂
B.weighs 15 pounds when full of CO₂
C.has 15 pounds of pressure at the nozzle
D.weighs 15 pounds when empty

你可能感興趣的試題

單項選擇題

Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be（）on board until the vessel’s Certificate of Inspection expires.

A.consealed
B.detained
C.contained
D.kept

單項選擇題

Accumulations of oily rags should be（）.

A.kept in nonmetal containers
B.discarded as soon as possible
C.cleaned thoroughly for reuse
D.kept in the paint locker

<sup id="wweps"><legend id="wweps"><div id="wweps"></div></legend></sup>