题干
选择合适单词填空。
A．minutes B．foot C．live D．next to E．straight F．far G．Sometimes H．right |
My name is Ann．I____in Flower Street．I usually go to school on____. ____ I go by bike．My home is not____from my school．Go____from the west school gate，turn left at the library．Walk about four____．You can see a post office on the____side．My home is____the post office．
答案(点此获取答案解析）
C,B,G,F,E,A,H,D
， 
的方程为普通方程，并说明它们分别表示什么曲线；