题目

Visiting the forest zoo     Come and see the Indian elephants and the new tigers from Northeast of China. The beautiful birds from England are ready to sing songs for you, and the monkeys from Mount Emei will be happy to talk to you. The lovely dogs from Australia want to laugh at you. Sichuan pandas will play balls for you. The giraffes from Africa (非洲) are waiting to look down on you.          Tickets                          Opening time  Grown-ups (成人) : 3 yuan        9:00 a.m.—4:00 p.m. (Monday—Saturday)  Children over 1.4 m : 2 y1台织布机1小时可以织布15米。照这样计算，4台织布机12小时可织布多少米？