1.已知ab互为相反数,cd互为倒数,m的绝对值是5,求m(a+b)+cd-2m的值
2.四个整数的积abcd=25,且a≠b≠c≠d,则a+b+c+d=
3.doing,now,i,busy,homework,am,doing,my(.)
4.foootball,with,Peter,is,friends,his,playing(?)
5.所有的气球都飞走了.Alltheballoons()()()
6.他紧紧抓着墙以免掉下去.Heholdsontothewallto()himself()()