【单选题】下面算式正确的是( ) A 56× ( 19 + 28 )= 56×19 + 28 B 43 × 12=43 × 10+2 C 64×64 + 36×64 = (64 + 36) ×64 D 37 × 13-13=0
【简答题】脱式计算,能简便计算的要简算. (1)13÷0.4÷2.5 (2)×4.5+36×4.5 (3)1.25×2.5×0.8 (4)1.5×101-1.5 (5)14.+3.7×2.8 (6)2.8×7.3+0.27×28.
【简答题】.简述Session对象与Cookie对象的相同点与不同点。
【单选题】Out-of-home advertising has become more effective because______.
A.
billboards can be replaced within two hours
B.
consumers travel more now than ever before
C.
such ads have been made much more attractive
D.
the pace of urban life is much faster nowadays
【简答题】25×27×4 45×36+×45 1.25×320×25 0.96×25 9.9×999+9.9 1.08×125 8×25×1.25×16 489×101-489 33×1.03 28×45+30×13 5.6×9+56 0.98×54.