阅读理解。 根据短文内容，回答下列问题。 Are You Still Looking for Your Son? Mrs White has a son. His name is Sam White. The young man begins to work in a post office in a city
Whether in the home or the workplace, social robots are going to become a lot more common in the next few years. Social robots are about to bring technology to the everyday world in a more humani
，整理得q=3,又
， 
＝3. ∴
，0），P（0，1），∴∠PCO＝
，设M（
）是过P点的圆C的切线上的任意一点，则在Rt△PMC中，有
,即为所求切线的 极坐标方程.