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【简答题】
三相异步电动机在一定负载下运行时，如电源电压降低，电动机的转矩、电流及转速有何变化？
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】灭火的方法有：( )、( )、窒息法、化学中断法。
【简答题】什么是语言演变的渐变性和不平衡性?二者关系如何?
【单选题】When Amy says, "It doesn't look good," what does she mean?
A.
We don't have any more time to investigate.
B.
The competition already knows the story.
C.
The bank statement shows that Nick is probably guilty.
【单选题】控制燃烧的条件入手，灭火的基本方法有( )。
A.
窒息法、冷却法、隔离法、抑制法
B.
窒息法、冷却法、隔离法
C.
窒息法、冷却法、隔离法、阻止法
D.
窒息法、冷却法、隔离法、控制法
【单选题】Talia says to Amy, "You've done your homework, haven't you?“ She's asking
A.
if Amy is prepared for the class
B.
if Amy has helped Jackie with the assignment for her acting class
C.
if Amy knows enough about Jackie to talk to her for a few minutes
【简答题】Check the things Amy says about the U.S.
【单选题】__________ sweaters look the same.
A.
Amy and Kate
B.
Amy and Kate’s
C.
Amy’s and Kate
D.
Amy’s and Kate’s
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