A.34 B.9 C.33 D.11
[单选题]3,8,1,12,21,( )。A.34B.9C.33D.18
[单选题]1, 2, 3,8, 21,46, ( )。A.70B.87C.90D.100
[试题]计算:(1)(-8)+(-9);(2)(-17)+21;(3)(-12)+25;(4)45+(-23);(5)(-45)+23(6)(-29)+(-31);(7)(-39)+(-45)(8)(-28)+37;(9)(-13)+0.
[主观题]填空。2/7=()/219/12=3/()5÷3=()/()=1又()/()
计算:(1)23×(-5)-(-3)÷(3)/(128);(2)-7×(-3)×(-0.5)+(-12)×(-2.6);(3)(1(3)/(4)-(7)/(8)
[单选题]1/2,3/2 ,11/8 ,21/32 ,( )A. 7/64B. 25/64C.12/31D. 13/64
[单选题]在1,1,2,3,5,8,13,21,34……这一斐波那契数列中,第12项是()。A .143.0B .144.0C .145.0D .146.0
[单选题]3,3,12,21,165,( )。A.649B.606C.289D.343
[主观题]0,2,1,4,3,8,(),12A.5B.6C.7D.9
月份 1 2 3 4 5 6 7 8 9 10 11 12-|||-气温(℃) 25 24 22 18 14 8 7 9 12 17 21 23-|||-降水(