你会玩”二十四点”游戏吗?请你在2,﹣6,﹣9,4,9五个数中,任选四个数利用有理数的混合运算,使四个数的运算结果为24(每个数只能用一次)( )。
4×9+2×(﹣6)
计算:0-14-(-1)+(-1.95)3×0.5×0-|-5|+5.
History tells us that in ancient Babylon, the cradle of civilization, the people tried to build a tower that would reach heaven.
A.center of civilization
B.place where civilization started
C.place where civilization was yet to emerge
D.the earliest period of civilization