be of - significance to的to是介詞嗎

是介詞，例如：

1、It will be of significance to create a good image of universities.塑造良好的高校形象，意義重大。

2、APEC Will Still Be of Significance to China Who Had Entered 對入世後中國的意義

3、The study of case relations in compound words should be of significance to the study of word-formation models.我們相信，複合詞格關係研究對計算語言學中