C2020·广东省广州市高二期末改编)Britishscientists have discovered the willow trees plantedat anangle could increase sugars for biofuel production.Willow is a fast-growing species. It is already usedto produce fuels for the renewable heating and powermarket In the future it could also help to prod...
C2020·全国卷IReturning to a book you've read many times can feel likedrinks with an old friend. There's a welcome familiarity-butalso sometimes a slight suspicion that time has changed youboth, and thus the relationship. But books don't change,people do. And that's what makes the act...
南充市金剑保安服务有限责任公司“以人为本”、“快乐工作”的企业文化打造出优秀的经营管理团队;标准化、流程化、现代化的可复制可持续的高速发展;先进的经营策略和现代化的商业模式使其避开了充满恶性竞争的红海,创新开辟出一片充满希望的蓝海。公司从2014年01月28日成立伊始,凭借自身优势并通过多年的努力,公司主要...
Chopsticks play an important role in Chinese food culture. They: (1)___(call) "Zhu" in ancient times in China. Chinese people have been using them for more than 3,000 years. Wood or bamboo chopsticks are the most popular ones used in Chinese homes, (2)___can be dated to about 1...
注册地址天津生态城动漫中路126号动漫大厦C区二层209(TG第446号) 经营范围技术开发、技术服务、技术转让、技术咨询;软件开发、软件服务、软件咨询;销售、租赁自行开发的产品、电子产品、通讯设备、计算机;旅游咨询、旅游服务;从事货物及技术的进出口、代理进出口;设计、制作、代理、发布广告;票务代理(不含航空机票销售...
1/1 ¥1469.00已售:755 佳能(Canon)NPG-52 感光鼓组件(品红色)(适用iR-ADV C2220/C2225/C2230/C2220L/C2020/C2025/C2030) (限购福建省内) 送至 福建 厦门 湖里区 可配送下订单后3~5天后货到仓库 货到付款 免运费 顺丰配送 0人评价 商品评价 ...
C2020广西南宁第三中学高一期末In 1947 a group of famous people from the art world headed by an Austrian conductor decided to hold aninternational festival of music, dance and theatre in Edinburgh. The idea was to reunite Europe after the SecondWorld War.It quickly attracted famous names such as...
C2020江西瑞金市第六中学月考·改编]I think I will be a doctor in eightyear. My father is a doctor and my motheris a nurse. They are working in the samehospital. I think they are so great. TheyBenalways give a hand to the sick people.My hobby is singing. My dream is tobe a popul...
(12分)设数列la,)中a=4,an=4an-1(n≥2),设.,a..(1)求数列b}的通项公式;(2)令cn=(-y·h,求C1+C2+…+C2020. 相关知识点: 试题来源: 解析 19. (1)因为a=4,n=4an(n≥2,n∈N*)所以数列la,)是以4为首项以4为公比的等比数列...2分所以an=4×4”1=4......
[解答]由数列{an-|||-},{bn}-|||-n,{cn}-|||-n均为等差数列, 所以数列{an+bn+cn}也是等差数列, 且首项为a1+b1+C1=1,公差为(a2+b2+C2)-(a1+b1+C1)=3-1=2, 所以a2020+b2020+C2020=1+(2020-1)×2=4039. 结果一 题目 已知数列{an},{bn},{cn}均为等差数列,且a1+b1+c1=...