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（单选题）图示为载流铁芯螺线管，其中哪个图画得正确？（即电源的正负极，铁芯的磁性，磁力线方向相互不矛盾。）

A

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

B

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

C

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

D

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

E

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

F

https://qn-next.xuetangx.com/15665406751113.jpg、https://qn-next.xuetangx.com/15665406762167.jpg、https://qn-next.xuetangx.com/15665406391826.jpg、https://qn-next.xuetangx.com/15665406423209.jpg、[{"key":"A","value":" class="import-img" height="80px" ","showEditor":false},{"key":"B","value":" class="import-img" height="80px" ","showEditor":false},{"key":"C","value":" class="import-img" height="80px" ","showEditor":false},{"key":"D","value":" class="import-img" height="80px" ","showEditor":false}]

正确答案：

略。

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