【单选题】Recycling is one way to protect the enviroment; reusing is _____
【单选题】干阑式民居主要分布在我国的( )?[1分]
【单选题】轻钢龙骨吊顶中,吊筋与主龙骨之间的连接是什么?
【单选题】The phrase 'synergistic effect' in the last paragraph is closest in meaning to ______.
【多选题】Teaching activities in Cooperative Lanuage Learning enviroment involves
【简答题】协同作用(synergistic effect)