四边形ABCD与四边形A₁B₁C₁D₁相似，相似比为2：3，四边形A₁B₁C₁D₁与四边形A₂B₂C₂D₂相似，相似比为5：4，则四边形ABCD与四边形A₂B₂C₂D₂相似且相似比为（　　）

肺泡外缠绕着丰富的毛细血管网，这有利于（　　）

如图，将边长为4的正方形ABCD的一边BC与直角边分别是2和4的Rt△GEF的一边GF重合．正方形ABCD以每秒1个单位长度的速度沿GE向右匀速运动，当点A和点E重合时正方形停止运动．设正方形的运动时间为t秒，正方形ABCD与Rt△GEF重叠部分面积为S，则S关于t的函数图象为（　　）

根据短文内容判断句子正（T）误(F)。
Welcome to our school. Our school is on Xianyang Street. It’s next to the Xinhua Library. There is a big garden across from our school. The payphone is between our school and the post office. There are three buildings in our school, the students' building, the teachers'building and a library. The teachers in our school are good. Our school yard is very beautiful. If you come to our school from the airport, take a taxi and go along the highway until you see a bridge. Go across the bridge and turn left. Then go straight along the Bridge Street. Our school is on the right.