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【单选题】
交流变频调速属于（ ）。A.
电气无级调速
B.
恒功率调速
C.
恒磁通调速
D.
电气有级调速
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反馈参考答案：
举一反三
【简答题】阅读理解。 Jill lived with her grandma. The old woman was strong enough that she could do everything herself at home. As soon as Jill began to tidy the rooms or wash something, her grandma stopped her and ...
【单选题】She picked up a wallet _____ home. [ ]
A.
on her way
B.
in her way
C.
to her way
D.
in the way
【单选题】She could do nothing but_______ to her teacher that she was wrong.
A.
admit
B.
admitted
C.
admitting
D.
to admit
【单选题】逆压梯度的存在是边界层发生分离的必要条件，而分离的真正产生要看边界层内流体是否发生倒流。在具有相同外流的逆压梯度条件下，边界层中哪种流态不容易发生分离?
A.
层流边界层；
B.
湍流边界层。
【简答题】阅读理解。 Jill lived with her grandma. The old woman was strong enough that she could do everything herself at home. As soon as Jill began to tidy the rooms or wash something, her grandma stopped her and ...
【多选题】ApplicationContext是Spring的核心容器,我们常用ApplicationContext 接口的实现类来完成Spring工厂的初始化,下面那些是 ApplicationContext接口中 面向 XML 的 最常用的实现类是:
A.
ClassPathXmlApplicationContext
B.
FileSystemXmlApplicationContext
C.
AnnotationConfigApplicationContext
D.
AnnotationConfigWebApplicationContext
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