简述PSI检测装置使用条件?
参考答案:
①周围介质温度不高于+50°,不低于-40°。
②空气相对湿度不大于65%。
③防雨、防沙、防盐的环境。
④在没有剧烈振动或颠簸的地方。
人们在生活和生产中为了防止事故发生,需要采取一些安全措施。下列措施不当的是[ ]
A.严禁旅客携带易燃、易爆物品乘车
B.人居社区配置消防设备和设置消防通道
C.夜晚发现煤气泄漏立即开灯检查
D.加油站、面粉厂附近严禁烟火
The winner of the Grand Slams said that he had owed his success to many people,____ his parents . [ ]
A. after all
B. by chance
C. on purpose
D. in particular