【简答题】已知公称尺寸为 35的孔和轴:孔的上极限尺寸为φ35.005mm,孔的下极限尺寸为 φ34.997mm;轴的上极限尺寸为φ34.993mm,轴的下极限尺寸为φ34.985mm。求孔、轴的极限偏差及公差,并画出公差带图 。 注:可以在纸上写出答案拍照上传。
【判断题】对受体具有选择性结合能力的生物活性物质叫做配体。
【单选题】'Fixing the self' in the 6th paragraph probably means ______.
A.
staying firm on same position
B.
identifying one's role in a team
C.
standing out in performing important task
D.
excluding others from a team
【单选题】Maximizing profits also means that a firm is attempting to:
A.
. make as much output as possible.
B.
. change the market price.
C.
. produce at the output level where the difference between total revenue and total cost is the greatest.
D.
. produce below its break-even price.
【多选题】支架预压的目的是( )
E.
使桥梁线形符合设计要求,避免箱梁混凝土因支架不均匀沉降出现开裂。
【单选题】The manager ask us to firm order,the firm order means __ __ ?
【简答题】偏振光通过光学活性物质的溶液时,其振动平面所旋转的角度叫做该物质溶液的 ,以 α 表示。