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【判断题】
和谐系列动车组牵引变流器整流和逆变器都是采用GTO大功率半导体器件进行电能的转换A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Ⅰ. At a pedestrian crossing: a) When you have stepped off the pavement on to a zebra crossing, traffic must stop to let you cross. But don't be foolish: make sure that drivers have enough time to give...
A.
expect cars to stop for you
B.
cross without giving the driver enough time to stop
C.
step off the pavement
D.
expect drivers to give you enough time to cross
【简答题】What is a stressor ?
【简答题】应激原(stressor)
【简答题】□ Mañana por la mañana (saber,yo) si (estar)libre o no el fin de semana. ■ Entonces te (llamar) mañana por la mañana.
【单选题】Which of the following is not the stressor?
A.
suicide
B.
work pressure
C.
unemployment
D.
study
【简答题】压力源(stressor)
【简答题】What is a stressor?
【简答题】Mamá dice :“Mañana voy al supermercado si tengo tiempo” Mamá dice ( ) mañana ( ) al supermercado si ( ) tiempo.
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