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基本投影面有几个？

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Simon is job hunting and is askingMs. Wright for a reference (推荐信). Listento the conversation and decide whether the following statements are true(T) or false (F).1. The man is moving to another place.____1_2. The woman refuses to provide a referencefor Simon.2__3. The man enjoys working in his currentcompany._3_4. The woman has mixed feelings aboutSimon’s leaving._4___

剖视图要在剖面区域画出剖面符号。

A. 对
B. 错

剖视图标注时应有以下三项内容：____.

剖面线的线型是——————。