A-A+ Muscles are unique fibers because they can __ 2022-08-07 17:26:48 问答库 阅读 182 次 问题详情 Muscles are unique fibers, because they can ______ .A.contractB.stretchC.retractD.do all of the above请帮忙给出正确答案和分析,谢谢! 参考答案 正确答案:D