下图是三自由度系统，其中<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/8e8b8c59c32c43f9a0c19468506d743a.png?x-oss-process=image/sharpen,200"/>利用柔度影响系数法建立柔度矩阵为（）。<br/> <img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/371cd5617edc4d9e9db14f8fb6e98cba.jpeg?x-oss-process=image/sharpen,200"/>