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【多选题】
关于接触器的说法错误的是( )。A.
当接触器切断电路时，如电路中电压超过12V，在断开两触点时瞬时形成很强的电场，出现电弧
B.
接触器的电磁机构是将电磁能转换为机械能，使触点闭合或断开，并兼有失电保护作用
C.
接触器铭牌上的额定电流是指线圈上所能承受的最大电流
D.
电磁式继电器的基本结构与接触器类似，由电磁机构、触头、反力系统和灭弧装置等部分组成
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A.
in favor of
B.
in search of
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in charge of
D.
in need of
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A.
steps should be taken to get the dropouts back to campus
B.
the dropouts should return to a lower quality school to continue their study
C.
the Ph.D holder is generally a better adjusted person than the dropout
D.
the high dropouts rate is largely attributable to the lack of stimulation on the part of faculty members
【简答题】A．users B．learners C．students D．educators
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