下图为世界某区域著名绿色工程示意图。兴建该工程最主要为了  (　　)

设点A（﹣3，5）和B（2，15），在直线l：3x﹣4y+4=0上找一点P，使|PA|+|PB|为最小，则这个最小值为____ 

下列说法中不正确的是（　　）

根据短文内容，判断以下句子的正误。对的在括号内填“正确”, 错的填“ 错误 ”。

    Jim is an English boy. He comes to China with his father and mother. They come here to work. Jim comes here to study.

    He is in No. 5 Middle School. He gets up early every day. He isn't late for school. He studies hard. He can read English well. He often helps us with our English, and we often help him with his Chinese. After class he likes playing football, swimming, running, jumping and riding. He makes many friends here. We are glad to stay with him. On Sunday he often helps his mother clean the house, mend something or do the shopping. He likes Chinese food very much.

     He likes living here. He likes Chinese students very much. We all like him, too.