单项选择题

开放性粉刺也称为黑头粉刺，堵塞毛孔的皮脂与空气接触氧化并黏附角质和灰尘，颜色变深，并将毛孔撑大，但无明显炎症反应，无触痛感，需要及时挤出或扣掉。（） A. 对 B. 错

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Rhino6.0中的命令都支持记录建构历史。
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单项选择题

The following Satements have been made about target costing:
1) it is more difficult to implement target costing in service industries compared to manufacturing because of the lack of a tangible product
2) target costing makes the business look at what competitors are offering at an early stage in the new product development process
Are the statements true or false?

A、Both statements are true
B、Both statements are false
C、Only statement 1) is true
D、Only statement 2) is true