请你用笔画线代替导线将图所示的电路连接完整，并标出通电螺线管的N极.要求： 闭合开关后，向左移动滑动变阻器的滑片，通电螺线管的磁性增强.
多发性肌炎的下列哪项表述是不正确的：（）
A.四肢对称性近端肌无力
B.首发症状多为站立、上下楼和梳头困难
C.常伴肌肉酸痛和压痛
D.血沉和血清肌酶CK等正常
E.可伴颈肌无力，表现抬头困难
With respect to the Global Investments Performance Standards (), which of the following statements is least accurate Verification:（）
A. ensure the accuracy of composite presentations.
B. improve the consistency and quality of the firm's compliance presentations.
C. provide improved internal processes and procedures as well as marketing advantages to the firm.
), which of the following statements is least accurate Verification:（）