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【单选题】
三级无刷交流发电机永久磁铁磁极装在A.
副激磁机的转子上
B.
副激磁机的定子上
C.
交流激磁机的转子上
D.
在交流激磁机的磁极铁心中间
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】偶然误差具有下列( )特性。
A.
绝对值大的误差比绝对值小的误差出现的概率要大
B.
在一定的观测条件下，偶然误差的绝对值不会超过一定的限度
C.
绝对值较小的误差比绝对值较大的误差出现的机会大
D.
绝对值相等的正误差与负误差出现的机会相同
E.
偶然误差的算术平均值随观测次数的无限增加而变大
【多选题】What to introduce on the way to hotel?
A.
Welcome speech.
B.
Brief introduction of the city.
C.
Brief introduction of the itinerary.
D.
Sceneries on the way.
【单选题】The best way to introduce a new user to a computer system is to draw an ______ between the computer and some situation familiar to the user.
A.
image
B.
analogy
C.
imitation
D.
axis
【单选题】Which of the following is not a good way to introduce the topic of your presentation?
A.
I want to begin with a story that…
B.
Introduce a startling or interesting fact about the topic to make people think.
C.
Ask the audience questions, then wait for someone to answer before you move forward with your speech.
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