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【单选题】
如图所示，电流元【图片】位于圆心，由【图片】指向【图片】。已知【图片】 垂直于【图片】，则圆周上【图片】、【图片】、【图片】三点的磁感应强度的大小关系为 【图片】A.
最大
B.
最大
C.
最大
D.
一样大
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反馈参考答案：
举一反三
【简答题】在项目中创建窗体类ControlFormSize,在窗体中添加一标签控件,编写程序代码,设置窗体的标题、默认关闭方式与窗体大小,然后在标签控件中显示窗体设置的大小
【单选题】All her energies are ______upon children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
【简答题】Gao Yuanyuan, a Beijing girl, is lucky. She seems to have everything that most girls can only dream of. Her pretty face and slim figure were spotted by a talent scout (星探) when she was only 16. Now he...
【单选题】All her energies are ______ upon her children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
【简答题】利用染色体变异育种的是
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