1下列各句中,标点符号使用正确的一句是()A.这颗行星围绕运转的母恒星比太阳略小,略冷,但和太阳一样属于比较稳定,寿命比较长的恒星。因此,这也是首次在与太阳系类似的恒星系统中发现宜居行星。B.美国宇航局5日发布声明宣布,该局通过开普勒太空望远镜项目证实了太阳系外第一颗类似地球的、可适合居住 1 In the following sentences, the correct sentence for punctuation marks is () A. The planet around which the planet orbits is slightly smaller than the sun and slightly cold, but it is a relatively stable and long-lived star like the sun. Therefore, this is the first time that a livable planet has been found in a star system similar to the solar system. B. NASA issued a statement on the 5th that the agency confirmed the first Earth-like Earth system outside the solar system to be suitable for living through the Kepler space telescope project.