聯絡我們購買有聲講解函授課程或詢問面授家教上課細節:line: chiu020288我們的line群: 6個符號英文我們的email [email protected]我們的Tel: ... ... <看更多>

When NASA launches its next Mars rover this summer, it will have a very special cargo on board: A helicopter. NASA's Ingenuity aims to be ... ... <看更多>