【单选题】He _________the other students because he studies harder.
【判断题】F-22是美国洛克希德。马丁公司生产的第四代隐身战机。
【简答题】But he can play football only on Saturdays or Sundays, since he has to study on the other days. But he can play football only on weekends, because he______.
【单选题】几何形状误差包括宏观几何形状误差,微观几何形状误差和( )。
【简答题】经济生态学(Economic Ecology)是研究生态学和各类生态系统、种群、群落、景观、生物圈过程与( )过程相互作用方式、( )体制及其经济价值( )的科学;它谋求实现社会经济与自然生态的协调,以求得社会经济的可持续发展。
【简答题】A.She has been to all the countries in the world. B.He wants her to recommend some places she has been to. C.She is really lucky to have traveled a lot. D.She should he a guide for a travel agency.
【单选题】几何形状误差包括宏观几何形状误差,微观几何形状误差和( )。
【单选题】He has two friends here and he has _____ in Beijing. [ ]
【单选题】几何形状误差包括宏观几何形状误差,微观几何形状误差和( )。
【单选题】Henry has three good friends here and he has _____ one in London. [ ]