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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】下列关于卸料装置顶杆、圆柱头卸料螺钉的描述错误的是( )。【难】
A.
材料都采用45钢
B.
顶杆热处理硬度比圆柱头卸料螺钉热处理硬度低
C.
顶杆是以向上动作直接或间接顶出工件或废料的杆状零件
D.
卸料螺钉是固定在弹压卸料板上的螺钉
【单选题】Silas Minton’s funeral was a quiet (37) . It was (38) by the only (39) he had in the world, his niece and nephew, and by a few friends. The priest who (40) (41) a hundred miles into this wild par...
A.
to
B.
in
C.
on
D.
for