On the fully containerized ship,approximately one-third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to().
A. accelerations greater than on conventional vessels
B. accelerations less than on conventional vessels
C. accelerations the same as on conventional vessels
D. no acceleratio
钢轨探伤仪采用多探头法进行探伤,主要是为了提高探伤速度。
A. 正确
B. 错误
广泛用于扑救城乡、山林、草原火灾的常用灭火剂有()。
A. 汽油
B. 柴油
C. 水
D. 冰
在发电机组准同步并车过程中,一旦合闸成功,首先进行的动作是()。
A. 快速把待并发电机拉入同步
B. 负载自动向待并机转移
C. 自动调整待并机频率与电网一致
D. 自动调整待并机的端电压