it takes me 2 hours to get to school 既然前面说呢it takes me 2 hours为什么后面还要to get to school

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• it takes me 2 hours to get to school 既然前面说呢it takes me 2 hours为什么后面还要to get to school
• 一个英语填词.用方框中所给单词或短语的适当形式填空.shouldn't / how many / it / help...get/ with / how much/ be/ athletic1.My healthy lifestyle­­ ____ me ____ good grades.2._____ ______ hours do you sleep every night?3.She is stressed out.She ______ go to the party.4.He rides his bicycle to the bus station and _____ takes him about twenty miuntes.5.On Sunday,I have tennis training _______ the school team.6.We both like sports,although she is _____ _____ than me.7.I like to hav
• it takes me 2 hours to get to school 既然前面说呢it takes me 2 hours为什么后面还要to get to school
• 计算:(x^2-2xy)/(x^2-3xy+2y^2)-(xy+y^2)/(x^2-y^2)
• 等差数列{an}的前n项和记为Sn，若a2+a4+a15的值是一个确定的常数，则数列{Sn}中也为常数的项是（　　） A.S7 B.S8 C.S13 D.S15