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【简答题】
蜗杆头数Z1越大,导γ越__,传动效率越__。
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【单选题】The youny man didn't know ______ to get married or to wait.
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whether
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【单选题】A09118 装配A09.pdf 在SolidWorks中构建此装配体。 它包含2个轮子、2个连杆、1个连接块和1个底座。 轮子和底座的杆同轴心配合并与杆的端部平齐(无间隙) 。 连杆和轮子上的连接球重合。 连杆和连接块上的孔重合。 单位系统:MMGS(毫米、克、秒) 小数位数:2 装配体原点:任意 A=18.00 B=30.00 材料:6061合金;密度 = 0.0027 g/mm ^3 ...
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was it when that
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【单选题】The youny man didn't know ______ to get married or to wait.
A.
whether
B.
weather
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if
D.
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