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如图所示，在研究影响电磁铁磁性强弱因素的过程中，通过调节滑动变阻器连入电路中的阻值，改变通过线圈中的电流得到一组实验数据，如下表所示．请你根据表中数据，归纳出电磁铁磁性强弱与电流的关系是______． 电流/A 0.2 0.4 0.6 电磁铁吸引大头针的个数 12 24 36
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举一反三
【单选题】Why did Andy play the opera through the louderspeakers to all the inmates even when he knew he would receive severe punishment?
A.
He wanted to show his taste for music, especially the music of Mozart.
B.
He wanted to help his inmates learn how to appreciate the beauty of the opera.
C.
He wanted to share with his inmates the sense of coziness and freedom.
D.
He wanted to show his due respect to all the other inmates.
【简答题】When and why did all the employees receive a watch from the company?
【简答题】Answer these questions: 1 )When and where was the first Volvo manufactured? 2 )What kind of vehicles does Volvo manufacture? 3 )What was the idea behind the first Volvo? 4 )Why were there not a lot of...
【单选题】Why did Andy play the opera through the louderspeakers to all the inmates even when he knew he would receive severe punishment?
A.
He wanted to show his taste for music, especially the music of Mozart.
B.
He wanted to share with his inmates the sense of coziness and freedom.
C.
He wanted to show his due respect to all the other inmates.
D.
He wanted to help his inmates learn how to appreciate the beauty of the opera.
【多选题】以下关于子宫内膜增生期的描述中,哪一项错误
A.
为月经周期的第5~14天
B.
增生晚期螺旋动脉增长
C.
子宫腺极度弯曲
D.
增生晚期子宫内膜增厚
E.
又称卵泡期
【单选题】When and why did all the employees receive a watch from the company?
A.
on 1933 when Volvo had manufactured 10,000 vehicles.
B.
on April 14, 1977 when Volvo celebrated its 50th anniversary.
【单选题】以下关于卵泡膜的描述中,哪一项错误?
A.
由卵泡周围的卵泡细胞形成
B.
与卵泡细胞相贴
C.
外层纤维多，细胞少
D.
内层细胞多，纤维少
E.
于次级卵泡时期开始分层
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