... = + ≤ ≤ , Max = 100 1. .In mathematics,an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the ...
... 3. According to the reading, what does the word “symptoms” mean? (A)sickness (B) brain (C) sleep (D) cellphone (二) It can’t be any more important for students to get good grades. They need to study hard and also ...