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【单选题】
用细导线均匀密绕成长为l、半径为a(l >> a)、总匝数为N的螺线管,充满相对磁导率为 的均匀磁介质,若线圈中载有稳恒电流I,则任意一点的:A.
磁感强度大小为
B.
磁感强度大小为
C.
磁场强度大小为
D.
磁场强度大小为
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【单选题】关于面神经的描述错误的是
A.
躯体运动纤维支配面肌
B.
躯体运动纤维支配咀嚼肌
C.
传导舌前2/3味觉
D.
管理泪腺、下颌下腺和舌下腺的分泌
E.
不管理面部的感觉
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【单选题】对于副神经与舌下神经的生理功能，下列描述不正确的是
A.
副神经支配胸锁乳突肌和斜方肌
B.
副神经病变出现痉挛性斜颈
C.
舌下神经分支受损舌前1/3味觉、舌肌明显障碍
D.
舌下神经管出颅，支配舌肌运动
E.
舌下神经损害患侧舌肌萎缩，纤颤，伸舌偏向患侧，缩舌偏向健侧
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