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问题 选择题

有甲、乙两种糖，因售货员工作不慎，误把两种糖混倒在一起，已知甲种糖10kg，单价5.70元，乙种糖20kg，单价6元，若将这两种糖混合均匀后出售，应把单价定为[ ]

A．6.00元

B．5.90元

C．5.80元

D．5.70元

答案

答案：B

填空题

阅读下面短文，把A—D四个句子填入文中空缺处，使短文内容完整、正确、然后完成最后小题。

3Dprinters have been around us for some time. There is a lot you can do and image with a 3D printer. ____小题1:____

A company in China has recently used 3D printers to make ten full-sized housed in just 24 hours. ____小题2:____. These houses are printed wth special “ink ”that has been made from industrial construction waste. The using of cheap materials makes it possible to print each house under ＄500小题3:The CEO of the company says , “____小题4:____ ”He plans to set up 100 recycling factories across China and changing waste into cost-effective  “ink ”for 3D printers. ____小题5:____However ,at present ,multi-storeys 3D-printed building are not allowed in China. So,it’s important that the 3D printing technology will be widely used to build any time soon. Maybe there be still a long way  to go.

小题6:According to the passage ,which of the following is TURE?

A．Each of the printed housed costs at least 5000dollars .

B．There’s no limit in China to print tall building with 3Dprinters .

C．The 10full-sized houses are printed out of recycled materials.

D．3D printers will soon caome into commom use to build houses .
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填空题

果实包括______和______两部分．
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