组合电器气体密封性检测标准是()或符合设备技术文件要求。
A.小于等于0.5%/年
B.小于等于1%/年
C.小于等于1.5%/年
D.小于等于2%/年
参考答案:A
一名溺水游客被救出水后神志不清,呼吸停止,口唇发绀,需口对口人工呼吸的先决条件是()
A.清除口咽分泌物,保持呼吸道通畅
B.病人置于仰卧位
C.每次吹入800毫升气体
D.确定呼吸停止
E.每分钟吹气几次
Speaker A: So how do you find our city Speaker B:______
A.I came here by plane, of course.
B.Oh, I love it. It's so exciting.
C.To tell the truth, it's quite difficult to find your home.
D.What do you think of it