CFM56-3发动机的低压压气机和高压气机的内窥孔有何差别()
A. 低压压气机内窥孔无堵头,高压压气机内窥孔有堵头
B. 低压压气机内窥孔有堵头,高压压气机内窥孔无堵头
C. 低压压气机内窥孔有一个堵头,高压压气机内窥孔有两个堵头
D. 低压压气机内窥孔有两个堵头,高压压气机内窥孔有一个堵头
变压器有载开关油枕油位正常,并略()变压器本体储油柜油位。
A. 高于
B. 低于
C. 等于
对某目标进行n次等精度观测,某算术平均值的中误差是观测值中误差的1/n倍。
A. 正确
B. 错误
A report of casualty to a mobile offshore drilling unit must be made in writing to which office? ()
A. Commandant of the Coast Guard
B. Owner of the unit
C. Nearest Coast Guard Marine Safety Office
D. Captain of the nearest port