应该是doing 因为to是介词后跟doing。 例句：This means that students should not only attach importance to solving the rules of subject knowledge training, but also attached great importance to its culture of doing things the rules. 同学您好，如果问题已解决，记得采纳哦~~~您的采纳是对我的肯定~ 祝您策马奔腾哦~
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