[背景资料] 某热力管道工程，工程总造价5000万元，某施工企业通过招标投标方式获得了该工程的施工任务，该施工企业为了保证预期利润目标的实现，责成项目经理部对工程项目成本制订完善的控制和管理措施和方法。施工项目经理部通过成本预测、成本计划、成本控制、成本核算、成本分析和成本考核对其进行管理。 [问题] 成本预测的作用是什么
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According to the text, a good marketing strategy must primarily be concerned with（）
A. sales statistics.
B. product details.
C. consumer data.
D. profit information.
What does the writer say about sales management in the first paragraph（）
A. Companies should spend more time on their sales planning.
B. There are many managers who need to improve their sales performance.
C. Most sales managers fail to recognise which stage a product has reached.
D. The sales approach should change with each phase of the product life cycle.
分辨率是指 (4) ，灰度级是指 (5) 。 （4）处填（）。
A. 显示器所显示的像素点的亮度差别
B. 显像管荧光粉粒度的大小
CRT电子束的聚焦能力
D. 显示器所能表示的像素的个数
传染性非典型肺炎死亡病人尸体用0.5％过氧乙酸浸湿的棉球或纱布堵塞人体孔道，再用0.5％过氧乙酸浸湿的布单严密包裹后尽快火化。
A. 对
B. 错
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