题目

化学科学需要借助化学专用语言描述，下列有关化学用语正确的是A. CO2的电子式 B. Cl-的结构示意图C. 乙烯的结构简式 C2H4 D. 质量数为37的氯原子 答案：【答案】B【解析】A、CO2的电子式为，A错误；B、Cl原子的电子结构示意图为，所以Cl-的电子结构示意图中，最外层电子数为8，B正确；C、乙烯的结构简式为CH2=CH2，C错误；D、质量数在原子符号的左上角，质子数在原子符号的右下角，所以质量数为37的氯原子为，D错误；故合理选项为B。A used book or nearly-new kitchen gadget (配件) may not be at the top of every Christmas wish list, but hard economic times coupled with a new green awareness are changing attitudes about gift-giving in France. French holiday shoppers are choosing larger numbers for “green” gifting this Christmas, studies show. About 30 percent of French consumers will give second-hand items as gifts to stretch out their tight budgets but also to do their little bit for recycling, according to a study by international consulting firm Deloitte. The survey of Christmas consumer behaviors in 18 European countries found the French were more than twice as likely as other Europeans to give second-hand items. Websites promoting re-gifting and green gifting are popular in France, with many reporting a rise in business.“Concerns about the ecology and the economy have come together and we are now seeing people who accept the types of gifts that were not appreciated just a short time ago,” said Sebastien Ravut, who runs a website promoting eco-friendly consumerism. His site lists shops in France that offer fair trade products, bio-friendly goods and recycled items. Over the Christmas holidays, the number of visits to the site has doubled from last year, reaching 60,000 a month. A study by online survey firm Vivodi for PriceMinister showed eight out of 10 people would be happy to receive a used item as a gift and that younger consumers were more open to the idea. But Gilles Goldenberg, author of the Deloitte study, said that environmental concerns are not why customers buy used goods. “The number one concern is getting the lowest possible price,” said Goldenberg. “Eco-friendly products are drawing a lot of interest, but not if that means paying more.” Theatre tickets and other low-carbon gifts are fashionable, and eco-friendly websites are also encouraging gift givers to offer time and services instead of stuff. “The order of the day is to spend less time shopping and more time connecting” over the holidays, said Florence de Monclin from the Nicolas Helot foundation for Nature and Humanity.小题1:We can judge from the Deloitte study that _________.A．over a quarter of the French give second-hand Christmas giftsB．the French are less willing to buy eco-friendly gifts than other EuropeansC．80% of French people are happy to receive second-hand giftsD．less than 10% of European consumers are likely to give second-hand gifts小题2:According to Goldenberg, the main reason for customers to buy used goods is that _______.A．they want to be eco-friendly B．they want to save moneyC．it is encouraged by websites D．it is a new fashion in Europe小题3: All the following might be a promoted gift EXCEPT ________. A．a theatre ticket B．a second-hand bookC．a nearly-new digital toaster D．a box of heavily packaged chocolate小题4:Which of the following statements is TRUE?A．Old people are not open minded enough to accept second-hand gifts.B．People wish to receive second-hand gifts because of the economic downturn.C．Ravut’s website received a sharp decrease in visits during the Christmas holidays.D．In de Monclin’s opinion, people should spend more time with friends and family during holidays