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【单选题】
PYB表示（ ）圆锥破碎机A.
B.
标准
C.
短头
D.
短头
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Why does Scrooge always keep his office door open?
A.
To brighten his office
B.
To cool his office
C.
To check his clerk
D.
To chat with his clerk
【单选题】Which of the spirits does not speak to Scrooge ?
A.
The Ghost of Christmas Yet to Come
B.
The Ghost of Christmas Past
C.
The Ghost of Christmas Present
D.
All the spirits speak to Scrooge.
【单选题】回油阀调节式喷油泵油量单调、油量总调、定时调整的方法分别是 ( ) 。
A.
转动偏心轴、转动进回油阀下调节螺钉、升降柱塞
B.
转动进回油阀下调节螺钉、转动偏心轴、升降套筒
C.
转动进回油阀下调节螺钉、转动偏心轴、转动凸轮
D.
转动偏心轴、转动进回油阀下调节螺钉、转动凸轮
【简答题】What does Scrooge’s nephew Fred think of Christmas? Why did Fred insist on inviting scrooge every Christmas?
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