题目内容

下列各项中,属于生产经营决策中相关成本的是( )。

A. 增量成本
B. 机会成本
C. 专属成本
D. 沉没成本
E. 不可避免成本

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Listen to the passage. Fill in the blanks with the information you have heard.[音频]1) The chicken is the most commonly1, with a worldwide population of more than 19 billion in 2011.2) A person can identify the different types of chickens by their size,2, feather size, skin color, 3, and egg color.3) Chickens are4and live together in flocks. A flock of chickens containing only females will still 5, but the eggs will never grow into6 . They raise their young7and take turns keeping the eggs warm.4) Popular chicken dishes include8, fried chicken, chicken soup,9, and Gong Bao chicken.

化工设备从总体上分为两类: 和 。

化工设备选用一般原则是 、 、 、、 。

化工设备图中需标注的尺寸类型有哪几种?

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