ROS-3-1/4型盘形制动器的油缸直径是()(单片)。
t检验可用于同一批对象的身高和体重均数差异的比较。
A. 正确
B. 错误
举高消防车只有曲臂和主臂夹角超过(),伸缩臂才可伸缩。
A. 5°
B. 10°
C. 15°
D. 20°
In order to find out which lifeboat you are assigned, you should look at the ().
A. fire control plan
B. certificate of inspection
C. muster list
D. ships article