To turn over a liferaft that is floating upside down,you should pull on the().
A. canopy
B. manropes
C. sea painter
D. righting line
出入境检验检疫行政处罚工作,应当遵循公正、()的基本原则。
A. 公平
B. 公开
C. 合法
D. 合理
A direct current passing through a wire coiled around a soft iron core is the description of a simple().
A. magnetic shield
B. electromagnet
C. piezoelectric device
D. electromagnetic domai
LKJ-2000监控装置屏幕右边状态窗口的“开车”灯在按压【开车】键响应后()。