以下是针对飞机上急救设备——手提式氧气瓶(型号为120升5500-A1A-BF23A/311升 5500-C1A-BF23A)的使用方法排序正确的是( C ) 1 逆时针打开开关;2 戴上氧气面罩,罩在口鼻处;3 打开防尘帽(根据需要);4取出氧气瓶; 5 插上氧气面罩;6 使用完毕后将氧气面罩从氧气出口断开, 取下氧气面罩, 顺时针转动氧气释放旋钮关闭氧气瓶。 A. ①②⑤③④⑥ B. ①②③④⑤⑥ C. ④③⑤①②⑥ D. ④③⑤②①⑥
【简答题】B All of us eat every day, but most of us don’t understand nutrition. We often make mistakes in talking about good diet. For example, many people think that foods such as rice, bread and potatoes will...
【简答题】Most of us fear getting up and speaking in public. Many people don’t like to go gathering where they don’t know anyone, but while most of us soldier on (迎难而上), those with social anxiety disorder are o...