<p>图示空心变压器AB间的输入阻抗Zm应为下列哪项数值？(　　) <img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/17/90/179099c3ae080146cb53552ca272a872.jpg" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/c1/c7/c1c7c7b3459653c850bf071c0c2645c4.jpg" style="width: 100%;height: auto;"></p>