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已知⊙O的半径为10cm,如果一条直线和圆心O的距离为10cm,那么这条直线和这个圆的位置关系为 ____

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阅读下面的文字,完成下列小题。

                                                                                    清晨我漫步在山坡谷地,

                                                                                    晨光宣泄着永恒的秘密,

                                                                                    山涧里流倘出一条小溪,

                                                                                    她在歌、在唤、在吐露心曲


                                                                                    生活并非安逸,

                                                                                    它是思念和希冀。

                                                                                    死亡并非哀歌,

                                                                                    它是失望与憔悴。

                                                                                    智者不在言词,

                                                                                    其秘密在言词背后藏nì。

                                                                                    伟人不在高位,

                                                                                    不屑权位者才配享荣誉。

                                                                                   (纪伯伦《小溪,你说什么》节选)