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【多选题】
关于圆柱形螺旋弹簧画法错误的是( )。A.
在平行于轴线的投影面.上的视图电，各圈轮廓形状应画成螺旋线
B.
螺旋压缩弹簧无论还是右旋均可画
C.
螺旋压缩弹簧无论还是右旋均可画成
D.
对于需要规定旋向的螺旋压缩弹簧，不论还是右旋-~律要注出旋向
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反馈参考答案：
举一反三
【单选题】What great civilization did Alexander the Great come from?
A.
Romans
B.
Egyptians
C.
Greeks
D.
Chinese
【简答题】What did Alexander mean by saying "If I were not Alexander, I should be Diogenes."
【简答题】实验acket Tracer入门.doc
【简答题】What kind of preparation did the actors have for the battle scenes in Alexander?
【简答题】Why did the authors of the book cite the example of Alexander Fleming in the third paragraph?
【单选题】--What did Alexander Bell do? --He invented ______.
A.
telephones
B.
telephone calls
C.
telephone
D.
the telephone
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