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

單項選擇題

On a bulk chemical carrier,water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called().

A.acrylic acid
B.benzene
C.oleum
D.vinyl toluene

微信掃碼免費搜題