2022英语周报新目标安徽版答案

书面表达Dear Sir or MadamI am Li Hus, an exchenge student from China. Wanting to get a library card in your library.(背景2分)1 am writing to ask for some relvant information.(目的3分)to begin with, could you please tell me what kind of books can beborrowed?(要点一6分) besides, I would be very interested to ksomething about borrowing system, including how long I can keep thebooks, how many books I can borrow once, and how much I should pay(要点二6分)L8 t but not least, I also wonder when and where I canmake it.(要点三6分)a中aThanks for your ime and I would appreciate it if you can give an earlreply.(表感谢 期回复2分)1量里的0 Yoour sincere.yLi H点国惊口人国文

选B12.A据题意,得an 1-an=2,所以a2-a1=2,a3a=,"an=2,所以(a2-a1) (a3-a2) (an 1-an)=21 22 … 2",所以an 1-4=2(2-1).又a=2,所以am 1=2 1,所以an=2,所1S2=2 2 … 22=2(1-20=2-2.故选A

以上就是2022英语周报新目标安徽版答案，更多英语周报答案请关注本网站。