【单选题】_____ his knowledge of the mountainous country, John Smith was appointed as our guide.
【简答题】什么叫距离测量?距离测量的方法有哪些,都使用什么量具?
【简答题】常用的测量交叉跨越及对地距离的方法有哪些?
【单选题】Our guide gave us a detailed ()of this painting but we still do not understand.
【单选题】_______his knowledge of the mountainous country, John Smith was appointed as our guide.