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问题 单项选择题

技术创新的（）是指从产品的创新、工艺的创新中体现出经济发展中的主导作用，所以不仅仅是技术范畴的事。

A.综合性

B.创造性

C.创新性

D.市场连续性

答案

参考答案：A

单项选择题

A real estate developer has bought 1,872 acres of land on which to build a new neighborhood. He plans to zone the area for roads, common area, and housing plots on a ratio of 2:3:8, respectively. If a planned lake will take up 16 acres of the common area, how many acres of the common area will be left over for the clubhouse and golf course ？（）

A. 128

B. 144

C. 416

D. 432

E. 450
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单项选择题

热负荷不变，冷凝器之冷却风机转速与吸入风温度一定时，如冷凝器肮脏，冷凝器出入风温差有何变化（）

A.增加

B.减少

C.不变
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