【简答题】Fill in the blanks with the proper form of words given in brackets. The difficult work (courage) Alan and he left school. The (punish) was too harsh for him. They decided to (decorate) the room with m...
【判断题】金属材料的强度是指金属材料抵抗另一种更硬物体的能力。
【判断题】强度是金属材料在动载荷作用下抵抗破坏的性能。
【单选题】金属材料的屈服强度是表示材料的什么性能?
【单选题】Half of the students done most of the work. The rest of the work rather difficult. [ ]
【单选题】_____ it was finished in time.
A.
As the work was difficult
B.
Difficult as the work was
C.
Difficult as was the work
D.
As was the work difficult
【单选题】金属材料的强度极限σb是指()。
A.
金属材料在外力作用下产生弹性变形的最大应力;
【判断题】强度是金属材料在外力作用下抵抗变形和破坏的一种能力,金属材料的强度越高,表示所能承受的外力越大。