一个三位数,十位上的数大于7,而且正好是个位数的4倍,百位上的数比十位上的数少3,这个三位数是多少呢?
582
自然界中的生物,通过激烈的______,适应者_______,不适者_______,这就是自然选择。
The ancient church was almost before the fire fighter managed to control the fire. [ ]
A. burned down
B. burned out
C. burned off
D. burned up