在平行四边形ABCD的边AB和AD上分别取点E和F，使 $AE=\frac{1}{3}AB$ ， $AF=\frac{1}{4}AD$ ，连接EF交对角线AC于G，则 $\frac{AG}{AC}$ 的值是____．

根据情境及首字母提示填入适当的单词，使短文句意完整、通顺。
Pen pal wanted
   His name is Wang Lei. He is a____ C_____ boy. He wants a pen pal in____ F_______ . He thinks it’s a very____ i______  country and he wants to learn some French. He____ l_____  in Beijing, China with his parents now. He is 14 ____  y______  old and his____ b______  is in November. He can speak Chinese and a little English. What are his ____  l______ ? He likes watching sports games on TV and ____  p_____ computer games with his friends. His favorite subject is computer science. It’s____  f______ . He doesn’t like math, because it’s too difficult.
   Please write to____ h____ and be his pen pal.

近年来，中国高铁在全球市场接连斩获订单，在海外迅速掀起了“高铁热”，中国高铁技术已经成为国际新形象和新“名片”。雅万高铁、中老铁路已经开工建设，中泰铁路、匈塞铁路塞尔维亚段正式启动，俄罗斯莫斯科—喀山高铁、美国西部快线等项目正在加快推进。这表明（  ）

①我国进一步转变对外贸易发展方式，更加注重引资、引智、引技相结合

②高铁“出海”是我国实施“引进来”和“走出去”战略相结合的新举措

③我国进一步提高对外开放的水平，优化外贸结构

④我国抓住全球化的机遇，利用好国内国际两个市场