A:1000a+1
B:100a+1
C:10a+1
D:a+1
骆驼被称为“沙漠之舟”,它的体温随时间的变化而变化,在这一问题中,自变量是____ .
定义在R上的偶函数f(x),对任意x1,x2∈0,+∞),(x1≠x2),有f(x2)-f(x1)x2-x1<0, 则 ( )
With the help of the computer, the news can ___________ every corner of the world.