7/8-5/6= 2/9+1/2= 6/7-2/3= 3/10+1/4=
3/7+1/9= 1/3-1/5= 1/6+1/4= 5/7-1/5=
[单选题]计算:(2£«4£«6£«8£«…£«2010)£(1£«3£«5£«7£«…£«2009)2().A.995B.1011C.1111D.1005
[单选题]48 从 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 中任意选出三个数,使它们的和为偶数,则共有()种不同的选法。A. 40B 41C 44D 46
[单选题]计算:(2+4+6+8+…+2010)一(1+3+5+7+…+2009)=( )。A.995B.1011C.1111D.1005
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62
[单选题]3,2,4,1,9,7,6,8,( )。A.14B.28C.46D.62