单项选择题 以下属于在零件自制或外购决策过程中需要注意的要点的是（ ）。 A. 如果企业没有剩余生产能力，不需要追加设备投资，那么只需要考虑变动成本即可； B.自制方案一般需要考虑固定成本 C. 如果企业没有足够的剩余生产能力，需要追加设备投资，则新增加的专属成本也应该属于相关成本 D.如果剩余生产能力有其他用途，则必须考虑机会成本

未知题型 The sequence of English name is Christian name/Given name+(Middle name）+ Last name.

未知题型 Revised or rewrote the research paper to improve its overall structure or its parts, such as the introduction, middle paragraphs, and/or conclusion and and also to correct the grammatical errors and mistakes in citation and documentation. The revised essay has a transitional paragraph that clearly presents the main idea(s) of the research paper. (25%) The introduction provides the contextual information for the reader not quite familiar with the issue examined includes a trasitional paragraph. It has an interesting start. (15%) The middle section of the paper explains and analyzes the issue well, presents main ideas clearly, and supports them with sufficient explanations and/or evidence. The materials are well organized. (30%) The conclusion efficiently summarizes the ideas and gives impression closing remarks. (10% The essay is clear from plagiarism, and it strictly follows the APA format in in-text citations and the References page. (20%)