【正文】
x2+5x2…xn+5xn=1+4(1+x1+x2+…+xn),又N被4除時(shí)余1,N必為奇數(shù),而2003=5004+3,2005=5014+1,∴N只可能是2005,故選:D.(2)數(shù)學(xué)有一道挺難,一張紙,分成8片,取任意幾片再剪成8片,再取任意幾片剪成8片,這樣重復(fù)幾次最后可能會是多少片,(3)甲乙走路,甲走3小時(shí)等于乙走4小時(shí),問每小時(shí)行走的比是多少? (4)兩堆貨物,甲取出九分之一給乙后,甲乙就一樣,甲是乙的幾分之幾?(5)李老師去購置桌椅,他帶的錢的可以買課桌40張或椅子60張,但課桌椅要成套買,問課桌椅可以買多少套?(6)有4種顏色的撲克6張,好摸到同一花色的至少要取出多少張才能達(dá)到3張同色?(7)語文有文言文,精衛(wèi)填海的內(nèi)容 。39 s brother is doing his isnamp。quot Come with me,amp。(5分)( ) 1. The little boy standing at the store was about ________.A. eight years old B. nine years oldC. ten years old D. seven years old( )2. The boy was looking through the window because ________.A. he wanted a pair of shoes B. it was fun to do soC.