图7为”华北某小镇略图”。读图回答18~19题。 18.该城镇依托矿产资源,调整工业结构,发展循环经济,最适宜在该城镇布局的工厂是图7 A.建筑材料厂 B.化肥厂 C.冶炼厂 D.电镀厂 19.随着经济发展和人口增长,若该城镇规划一处新住宅,较合理的是 A.①处 B.②处 C.③处 D.④处Students in our school are encouraged to ________ more activities after class in order to broaden their knowledge. A. attend B. join C. take part D. participate in