摘要：题目描述 Lightning McQueen, Strip Weathers, and Chick Hicks are cars that compete in different races against each other. Some races — such as the Piston C 阅读全文

摘要：#### 题目描述 Merida wants some help in predicting her score for an archery tournament. When she fires an arrow, we can compute that arrow’s trajectory gi 阅读全文