2021-2022 英语周报 七年级45答案
22.(1)θ=时,如图为轨迹与y≤L相切的情景得r1=2L(1分)Pqu,B(1分)得正离子打到x轴上的范围为:0
第四部分写作第一节Dear Jack,Welcome to our school to study as an exchange studentAs for how to borrow books from the school libraryyou need to have your student ID card and present it to thelibrarian, who can register for you. Then you can go to thebookshelves to look for what you need. You can borrow 2books once and keep them for a week in order that you canhave enough time to finish reading them. If you haventread the book through, you can renew it. You' ll have topay for it if you get the book damaged or lost.hope all this can be of help to you. For morenformation, don,t hesitate to ask meLi Hua
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