A：我们要永远牢记母亲的呵护我们还要敬仰自己的母亲
B：我们要永远牢记母亲的呵护我们还要保护自己的母亲
C：我们不要忘记母亲的恩惠我们也不要忘记保护自己的母亲
D：我们不要忘记母亲的恩惠我们也不要忘记敬仰自己的母亲
圆E：（x+2）2+y2=4，点，动圆P过点F（2，0），且与圆E内切于点M，则动圆P的圆心P的轨迹方程是____
Mike is a middle school student. He goes to school from Monday to Friday. His home is about 5 miles from school. He usually walks to school. It takes him 30 minutes to walk there. Nancy's home is a little farther. It's 20 miles from school. So she often takes the school bus. It takes her 15 minutes to get to school. Bob lives outside the city. It's a town 30 miles away from his school. He takes the subway. It takes him 8 minutes to get to school by subway. He can have breakfast at home and then leave for the subway station. He studies very hard.
