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【简答题】
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【单选题】在d轴定向于转子磁链矢量的同步旋转坐标系中,如能保持转子磁链大小不变,则电磁转矩与定子电流的q轴分量成( )关系。
A.
平行
B.
反比
C.
正比
D.
垂直
【单选题】在d轴定向于转子磁链矢量的同步旋转坐标系中,如能保持转子磁链大小不变,则电磁转矩与定子电流的q轴分量成()关系。
A.
正比
B.
反比
C.
平行
D.
垂直
【简答题】按要求画一画,填一填.(图中每个小方格边长为1cm)画出图中三角形按3:1放大后的图形,放大后的三角形的面积是______平方厘米.
【单选题】Why did Magellan call the ocean the Pacific?
A.
Because he finally got to it.
B.
Because it was a new ocean.
C.
Because it was called the Pacific then.
D.
Because after struggles crossing the Atlantic, he saw it as calm and peaceful.
【单选题】Why is the exploration of the human-ocean connection very important?
A.
Because it can help human beings to make more amazing discoveries.
B.
Because healthy ocean can help reduce the growing burden our population is placing on this planet.
C.
Because we can know about how the ocean can provide for people.
D.
Because it contributes to my filming of the documentary.
【单选题】Why does Kate say, "That's a view of the ocean?"
A.
She thinks it's beautiful.
B.
She can't see a view of the ocean.
C.
We don't know.
【单选题】Why do the executives of AIG hesitate to distribute the money without the authorities consent?
A.
Because they are planning to win more subsidy from the federal.
B.
Because they couldn't hand out the money without agreement.
C.
Because they suffered a lot in the last similar event.
D.
Because they want to avoid conflict and public criticism.
【简答题】按下列要求画图。 (1)画出一个角关于直线l对称的图形; (2)画出四边形关于一边中点O对称的图形。
【简答题】Why did Magellan call the ocean the Pacific?A. Because he finally got to it. B. Because it was a new ocean. C. Because it was called the Pacific then. D. Because after struggles crossing the Atlantic,...
【简答题】①在如图所示的方格纸中,按下列要求画图: (1)过点C画AB的平行线DF; (2)过点A画AB的垂线MN. ②图中物体的主视图和俯视图如图所示,请在所给的方格纸中画出该物体的左视图?
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