What are the keys stages of human cultural evolution?还得麻烦下 这里的key stages 指的是从发现stone tools开始?还是建立Band TribeChiefdom State我感觉这个题目太大了 人类关键文化 到底怎么想啊 我还看到有什

are the engine power keys what are these keys ( for 还是to 跪求两分半钟英语：What are the keys to success? My keys are on the sofa 同上 are keys the where 连词成句如题 Are the keys yellow?的答句 Your keys are under the chair.提问 the keys are in the bag 为什么用are The keys are on the desk(改为否定句) The keys( )( ) on the desk. What _____ these keys?Are these yours?用介词填空 填空What are you doing?I'm()()my keys. Are the set of the keys ..? 还是Is the set of keys .? Where are the keys?They are ____the door. the keys are on the dresser 变为特殊疑问句 Where are the keys?回答:They _____ on the sofa. keys are the bed the under连词成句 the keys are on the table改一般疑问句 keys on the are dresser the 连词成句