【简答题】Who designed the first helicopter(直升机)? Who __1___some of most famous pictures in the world? Who knew more about the human body than most ___2___of his time? There is an answer ___3___ all these quest...
【单选题】The following issue is what we are going to discuss. Most of the people who【C1】______most often and【C2】______gloriously in the history books are great conquerors and generals and soldiers,【C3】______th...