The Bamboo Train, or “Norry” in the local language, is quite famous in Cambodia. The train is in fact a big bamboo bed with four wheels and a small engine. It can run at the s____ of up to 50 km/h on the tracks. Lots of v____go to Cambodia to enjoy the Bamboo Train ride. They have to pay 5 dollars per person to g____on the train. The best time to take the train is from 4 to 6 o'clock in the afternoon, b____it is cool when people enjoy the countryside view. “It feels more like a roller coaster, but it's really nice,” a Germany tourist Theresa Kessemeier said after she c____a ride. The Bamboo Train has become a popular tourist at action.

设函数f（x）=|x+ $\frac{8}{m}$ |+|x﹣2m|（m＞0）．

若经过点 的直线与圆 相切，则圆心坐标是____；半径为____；切线在 轴上的截距是____．

农民成天在田里头顶烈日，不停的劳作，所以我们要（  ）他们的劳动。