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【单选题】
三相异步电动机反接制动时,采用对称电阻接法,可以限制制动转矩的同时,也限制A.
A．制动电流
B.
启动电流
C.
制动电压
D.
都不是
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反馈参考答案：
举一反三
【判断题】george was severely punished for kicking an opponent in an attempt to put him out of action
A.
正确
B.
错误
【单选题】Margaret Spellings, the secretary of education, announced a pilot reform. to the No Child Left Behind Act (NCLB), George Bush’s education law, which was passed in 2002 Up to ten states, she said, woul...
A.
provide tests for pupils on maths and reading from third to eighth grade.
B.
add some science testing in schools for pupils aged from 8 to 13.
C.
enhance teaching standards which schools should be responsible for meeting.
D.
transfer pupils in falling schools to a better one or get them some tutoring.
【单选题】诊断高血压的标准是收缩压和(或)舒张压大于等于
A.
140/90mmHg
B.
130/80mmHg
C.
130/85mmHg
D.
139/89mmHg
E.
120/80mmHg
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