判断题

同一条无差异曲线上每点的效用相同

答案：正确

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一般来讲，大宗货物索赔期限比生鲜农产品的索赔期限更长（）

答案：错误

单项选择题

The function of spindle box for CA6140 machine tool is ( ) .

A、realizing the longitudinal feed motion of the tool rest
B、realizing the transverse feed motion of the tool rest
C、providing the spindle with forward and reverse speed at all levels
D、realizing the longitudinal and transverse fast feed motion of the tool rest