99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項(xiàng)選擇題

Fire extinguishers on inspected vessels are numbered by size I through V,with I being().

A.used for electrical fires only
B.the smallest
C.the most accessible
D.the most effective

微信掃碼免費(fèi)搜題