【单选题】---- The new shop across the road has taken away most of my . ----We must sell something cheaper.
【单选题】There is something we need to________before the meeting begins. [ ]
【简答题】(We were finally able to clear the high mountains) by throwing away a large pack of food.
【简答题】拉(压)杆横截面上的内力称为 ,其大小等于该横截面一侧杆段上所有 的代数和。
【单选题】We must start right away, ______ we will miss the plane.