【单选题】I thanked him for the offer but ___it___ .
【单选题】半导体中有________和空穴两种载流子。
【简答题】I thanked him for the offer but turned it
______.
【多选题】下列选项中,属于正确的人生目的的是( )。
【单选题】下列选项中,属于正确的人生目的的是( )
【单选题】Though ______ he said was of little help to me, I thanked him all the same
【单选题】图表的插入位于Excel菜单栏的( )菜单中。