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【单选题】
在直流电动机运行中,为了减小电动机的转速,正确的是A.
调换磁铁的极性
B.
增大流过线圈的电流强度
C.
改变线圈中的电流方向
D.
以上都不能减小电动机的转速
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反馈参考答案：
举一反三
【单选题】Operating activities:
A.
Are the means organizations use to pay for resources like land, buildings and equipment.
B.
Involve using resources to research, develop, purchase, produce, distribute and market products and services.
C.
Involve acquiring and disposing of resources that a business uses to acquire and sell its products or services.
D.
Are also called asset management.
E.
Are also called strategic management.
【简答题】线路金具是指连接和组合线路上各类装置,以传递机械、电气负荷以及起到某种防护作用的金属附件。()
【多选题】信息化教学工具的功能特点:( ) A、 方便快捷,具较强的针对性。 B、 促进教师教学发展 C、 生动形象,具有较强的趣味性 D、 交互性强,支持知识建构
A.
A
B.
cuow
C.
C
D.
D
【单选题】Operating activities:
A.
Are the means organizations use to pay for resources like land, buildings and equipment.
B.
Involve using resources to research, develop, purchase, produce, distribute and market products and services.
C.
Involve acquiring and disposing of resources that a business uses to acquire and sell itsproducts or services.
D.
Are also called asset management.
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