【判断题】压力表可用来测量设备内流体的真实压强。 ( )
【判断题】磁通势是造成磁路中有磁通的根源,因此也是反映磁场强弱的量;磁通势越大,产生的磁通越多,说明磁场越强。
【简答题】磁通势是造成磁路中有()的根源,因此也是()强弱的量;磁通势越大,产生的磁通越多,说明磁场越强。
【简答题】磁势是造成磁路中有磁通的根源,因此也是反映磁场强弱的量;磁势越大,产生的磁通越大,说明()越强。
【单选题】The main disadvantages of conference lines are low rates and flexible rules. ( )
【单选题】听力原文: Hundreds of demonstrators who've been blocking one of Italy's main railway lines since Friday in a protest about a local rubbish clump have agreed to end their demonstration. The protest in a sm...
A.
They blocked a railway line.
B.
They held the rail travelers.
C.
They cut water supplies to the trains.
D.
They closed a local landfill.
【简答题】To ____________________ of our business lines, we _______ a copy of our export list, showing the main items now ____________ and we hope that you would _____ us if any item is of _______ to you.