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

The SMS should provide for specific measures aimed at promoting the()of equipment or systems the sudden operational failure of which may result in hazardous situations.

A.visibility
B.ability
C.reliability
D.capability

微信掃碼免費搜題