Scientistshavedevelopedanon-stickchewinggum.Thenewgumca...
問題詳情:
Scientists have developed a non-stick chewing gum. The new gum can _1_____ (remove) easily from pavements, shoes and clothes. It’s the result of polymer (聚合體) research at the University of Bristol and could be launched commercially in 2008. ___2___ it catches on(流行), the product will solve __3___ major headache for present authorities around the world.
“The advantage of our Clean Gum is that _4_______ has a great taste, it is easy to remove and has the potential to be __5________ (environment) degradable (可降解的),” said Terence Cosgrove, a professor of chemistry __6 ___ helped to found a company called Revolymer to commercialize the technology.
Today’s chewing gums are made from synthetic(人工製造的) latex(植物的乳汁), which is resistant _7____ the weather and is strongly sticky. The new gum adds a special polymer to modify(修改,改變) its properties(特*), _8 _____ (make) it far __9 ___ sticky.
In two street trials, other commercial gums remained stuck to the pavement ___10 ___ Clean Gum came away(脫掉,脫落) naturally in all cases.
【回答】
1. be removed 2. If 3. a 4. it 5. environmentally
6. who 7. to 8. making 9. less 10. while
知識點:語法填空
題型:閱讀填空
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一個質量為4kg的物體靜止在足夠大的光滑水平地面上.從t=0開始,物體受到一個大小和方向週期*變化的水平力F作...
問題詳情:一個質量為4kg的物體靜止在足夠大的光滑水平地面上.從t=0開始,物體受到一個大小和方向週期*變化的水平力F作用,力F的變化規律如圖所示.則( )A.t=2s時物體沿負方向運動的位移最大B.t=4s時物體運動的位移達最小值C.每個週期內物體的速度變化為一定值D.從t=0開...
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如圖,形狀相同、大小相等的兩個小木塊放在一起,其俯檢視如圖所示,則其主檢視是( ).
問題詳情:如圖,形狀相同、大小相等的兩個小木塊放在一起,其俯檢視如圖所示,則其主檢視是( ).【回答】D知識點:三檢視題型:選擇題...
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用若干個體積為1的正方體搭成一個幾何體,其正檢視、側檢視都是如圖所示的圖形,則這個幾何體的最大體積與最小體積的...
問題詳情:用若干個體積為1的正方體搭成一個幾何體,其正檢視、側檢視都是如圖所示的圖形,則這個幾何體的最大體積與最小體積的差是()A.2B.3C.4D.5【回答】解析:由正檢視、側檢視可知,此幾何體的體積最小時,底層有5個小正方體,上面有2個小正方體,共7個小正方體;體積最大時,底...
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閱讀下面唐詩,完成①―③題。(10分)書邊事。張喬調角斷清秋,徵人倚戍樓。春風對青冢,白日落梁州②。大漠無兵阻...
問題詳情:閱讀下面唐詩,完成①―③題。(10分)書邊事。張喬調角斷清秋,徵人倚戍樓。春風對青冢,白日落梁州②。大漠無兵阻,窮邊有客遊。蕃情似此水,長願向南流。註釋①:唐朝自肅宗以後,河西、隴右一帶長期為吐蕃所佔。此後,因民眾起義及吐蕃將領降唐,其地又全歸唐朝所有。本...
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