问题 单项选择题

绘制夹具总图时应首先用______画出工件的轮廓图。

A.点画线

B.双点画线

C.虚线

D.细实线

答案

参考答案:B

计算题
材料分析题

读表,回答问题。

(1)四种模式中,旅游业发展条件最优越的是_________。

(2)分析模式2旅游业发展的优势与劣势。

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(3)分析模式3发展旅游业比较困难的原因。

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(4)分析模式4发展旅游业应采取哪些措施?

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