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III.语法填空(10分)新素材 素材来源:《英语周报》[2021原创]In Chinese, people use “look like Pan An(貌似潘安)”31. ___(describe) a good-looking man. But who is Pan An? Pan An is a writer, and he32. ___ (live) during the Western Jin Dynasty. He is one 33. ___ the best-lo...
已知……{an}中,若a10=100,前10项和S10=100,求Sn数列{an},{bn}是项数相等的两个等差数列p、q为常数,那么数列{pan+qan}为等差数列么?why? 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 1.因为a1=1 d=3 所以 an=1+(n-1)d 代入an=100 得n=34因为sn=[(a1+a34)/2]*...
产品名称:AN-10R 磁性开关AN-8P,AN-8TP,AN-9P,AN-10P,AN-12P,AN-15P,AN-16P 产品型号:AN10R 产品价格:电议 产品产地:中国大陆 访问次数:857发布时间:2013/4/2 12:33:22 简介内容:AN-10R 磁性开关AN-8P,AN-8TP,AN-9P,AN-10P,AN-12P,AN-15P,AN-16P,AN-17P ...
已知数列{an}满足:对任意n∈N*均有an+1=pan+3p-3(p为常数,p≠0且p≠1),若a2,a3,a4,a5∈{-19,-7,-3,5,10,29},写出一个满足条件的a1的值为 . 相关知识点: 代数 数列 数列递推式 试题来源: 解析 -1 【分析】取a2=-7,a3=5,得5=-7p+3p-3,解得p=-2,由此求出a4=-19,a5=...
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主题体裁字数y难度建议用时正确率《彼得· 潘》记叙文 3027分钟/10Peter Pan wishes Wendy, John an d Michael, especially Wendy, woul d stay in Neverland forever,but finally th e Darling children deci d e to fly back hom e an d grow up."Quick, Tink," Peter whispers.“S 1 th e window...
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主题体裁字数难度建议用时正确率《彼得· 潘》记叙文302★★★7分钟/10江苏 · 扬州中考Peter Pan wishes Wendy, John an d Michael, especially Wendy, woul d stay in Neverland forever, but finally th e Darling children deci d e to fly back hom e an d grow up."Quick, Tink," Peter whispers...