解:(1)设圆心为(3t,t),半径为r=|3t|,
则圆心到直线y=x的距离 d=3t-t2
You should put the burned area under the ____ (run) water.
(1)计算:(3﹣2014)0+|﹣tan45°|﹣(12)﹣1+8
(2)解方程:2xx-1+11-x=3.