【单选题】以下几种构件的受力情况,属于分布力作用的是:
【简答题】从方框中选出恰当的句子补全对话,有两项为多余项。 A. What about lunch? B. Does she have dessert? C. Do you know Sandra Clark? D. She has chicken, tomatoes and French fries. E. What does she have for supper? F. She eats lots o...
【简答题】选出恰当的句子,补全对话。 A. Are these carrots? B. Who is this man? C. Thirty-five. D. He's a farmer. E. Is this a dog? A: Look at the picture of my family B: 1____ A: He's my uncle B: What's your uncle? A: 2...
【简答题】影响极限应力的因素有( )。A. 载荷; B. 材料性质; C. 截面尺寸; D. 工作条件;
【单选题】以下几种构件的受力情况,属于分布力作用的是()。
【简答题】影响无粘结预应力钢筋的极限应力值的因素有( )、 ( )、 ( )和( )等。
【单选题】露营地应选择在:安全、( )、平坦、近水处