英国历史学家汤因比研究过21种在历史上曾经出现过,后来相继消亡的文明。结论是这些文明死亡的原因,无一例外,都不是他杀,而是自杀。他们失去了创新的活力,被历史淘汰出局。由此可以得到的重要认识是,大国的崛起( )
A:靠的是科技,国与国之间的较量说到底就是国民素质的较量
B:是人才的较量,英国开创国家垄断资本主义模式赢得了人才优势
C:始终拒绝技术革新是文明死亡的共因
D:大敌当前斗争不力,以致绝望自杀是文明国家死亡的原因
最小质数的倒数是____,0.25的倒数是____.
若=3是方程x2-3mx+6m=0的一个根,则m的值为( )
Now boys and girls, I have got something to t____ you. Tomorrow is Friday. We are going to have our O____ Day. Our parents will come to school and v____ our school. They will a____ at three t____. They will s____ in the classroom and listen to our teachers. Then they will go to the p____ to see our wonderful show.