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【单选题】
两个相距不太远的平面圆线圈, 一线圈的轴线恰好通过另一线圈的圆心. 怎样放置可使其互感系数近似为零A.
两线圈的轴线相互平行
B.
两线圈的轴线相互垂直
C.
两线圈的轴线成45°角
D.
两线圈的轴线成30°角
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皮皮学刷刷变学霸
举一反三
【简答题】A．s B．specialists C．peers D．pedestrians
【简答题】No Pedestrians
【简答题】Watch for Pedestrians
【简答题】Aggressive pedestrians are in fact as erous as careless drivers. They cause traffic accidents, injury and death. These erous walkers can be seen in any big city over the world. About 69% of la...
【单选题】D Cities alarmed by deaths and injuries of pedestrians are taking efforts to make crosswalks safer for people on foot, especially seniors and children who need more time to cross streets. A pedestrian...
A.
Among 100 pedestrian deaths there were 21 people younger than 70.
B.
Old people are more likely to meet with accidents in crosswalks.
C.
Traffic accidents killed more old people than young people.
D.
About seven traffic accidents happened per hour.
【单选题】The first underground floor is set aside mainly for pedestrians and commercial facilities, while the second underground floor is planned for parking. {A; B; C}
A.
地下一层主要用于人行通道和商业设施，而地下二层计划用作停车场。
B.
地下一层仅用于人行通道和商业设施，而地下二层计划用作停车场。
C.
地下一层主要用作停车场，而地下二层用作行人通行和商业设施。
【简答题】Aggressive pedestrians are in fact as erous as careless drivers. They cause traffic accidents, injury and death. These erous walkers can be seen in any big city all over the world. About 69% o...
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