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听录音,选择听到的单词 That’s not _______.
A、fire
B、fair
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
A、fire
B、fair
A、surgical repair of the sinus
B、incision of the sinus
C、inflammation of the sinus
D、excision of the sinus
Imagine that you and your team have designed a machine which can remove chewing gum from floors and pavements by treating the gum chemically to transform it into powder and then using vacuum suction to remove it. The following sentences are from the abstract of your research. Please rearrange the sentences in the correct order. 1 A machine, GumGone, was designed and constructed, which injected non-ionic detergent into gum deposits using a power spray and then immediately vacuumed the resulting powder. 2 The fats and resins in chewing gum contribute to elasticity, bulk and texture but also increase staining. 3 Performance was superior to existing systems and suggests that the delay between treatment and removal is a significant factor in staining. 4 The aim of this study was to design a gum removal machine able to remove gum chemically with no stain residue. 5 It was found that 1 μl of detergent achieved effective, stain-free removal over a 300 square meters area.
-________.
A.Not really. We' re looking for a restaurant for lunch.
B.Not yet. It depends on the weather,I think.
C.Let me see... There' s a reasonable one down the road, to the left.
A、monopolistic
B、perfect
C、capitalistic
D、free market
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