【多选题】室内消火栓 栓口安装高度距地面宜为( )m,其出水方向宜与设置消火栓的墙面成( )度或向下
【多选题】下列关于各类防毒面具的说法中,正确的有{.XZ
B.
全面式供气面具为呼吸系统、眼睛、面部皮肤和头发提供良好的保护
D.
供气式防毒面具是通过空气软管向面具中供应新鲜的压缩空气
E.
手掌放到滤芯上并吸气可对滤筒式呼吸器进行负压测试
【简答题】According to the video, if you havn't meet a person before, how do you greet him?
【判断题】供气式防毒面具是通过空气软管向面具中供应新鲜的压缩空气
【单选题】How do you greet him/her when you see your friend again after the Spring Festival?(微课2)
A.
How is your day going?
B.
Long time no see. What’s new?
【单选题】How do you greet him/her when you see your friend again after the Spring Festival?
A.
How is your day going?
B.
Long time no see. What’s new?