对于转速越高的旋转件,规定的平衡精度越高,即偏心重量应。()
A、越大
B、越小
C、不变
D、很大
参考答案:B
— Could you tell me ______?
— I live in Yan'an.[ ]
A: where you lived
B: where were you born
C: where you live
D: where you were born
某矩形截面简支梁。b×h=200min×500mm,混凝土强度等级为C20,箍筋采用双肢直径为8mm,间距为200mm的HPB235级钢筋,该梁斜截面破坏时为()。
A.斜拉破坏
B.剪压破坏
C.斜压破坏
D.界限破坏