题目7A. K<img src="https://tihai-oss-cloud.itihey.com/img/b2de08b6b1b1f70172a670e2d0684c57.webp">平衡电位B. Na<img src="https://tihai-oss-cloud.itihey.com/img/b2de08b6b1b1f70172a670e2d0684c57.webp">平衡电位C. 静息电位绝对值与Na<img src="https://tihai-oss-cloud.itihey.com/img/b2de08b6b1b1f70172a670e2d0684c57.webp">平衡电位之和D. 静息电位绝对值与Na<img src="https://tihai-oss-cloud.itihey.com/img/b2de08b6b1b1f70172a670e2d0684c57.webp">平衡电位之差E. 超射值