题干
短文填空。
Yesterday ____ (is) sunny. Jim ____ (go) to the zoo with his friends. They ____ (buy) some ice cream and ____ (see) many animals. They ____ (have) a good time.
答案(点此获取答案解析）
was,went,bought,saw,had
为坐标平面上三点，O为坐标原点，若
与
在
方向上的投影相同，则
与
满足的关系式为 （ ）
