【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
【单选题】听力原文:W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
【单选题】投影线互相平行且垂直于投影面的投影方法称为()
【单选题】听力原文:W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
【单选题】低碳钢扭转破坏的断面是( ),铸铁扭转破坏的断面是( ),铸铁破坏属于( ),所以( )适合承受扭力。