（1994+1992+······+4+2）—（1+3+5+······+1991+1993）=（ ）

（1994+1992+······+4+2）—（1+3+5+······+1991+1993）=（ ） 计算1/（1*4）+1/（4*7）+1/（7*10)+------+1/(97*100)································································································ 求英语辅导报鲁及版2008——2009初二上4期答案求求啦·························································································来 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? His mother gives him some money.(改为同义句) His mother gives --- ---- ---- ---- .4个空急······························································ 小数口算题,15道,比如5.8*5,2.5*4,6.5/0.5.写清楚点,格式：····························································· ···· · · · ···· ·········· ·········· 求··············· 什么植物有应激性只要植物名 ········································································································· 急·························· 急 ··············急············ 长为5宽为4高为3的长方形的展开图怎样画?快来帮帮忙呀!急用·······················································