读古诗《村居》，回答问题。

《村居》的作者是____朝后期的诗人____，诗的前两句是____，____。

在一个盒子里装着只有颜色不同的若干黑、白、红三种颜色的珠子，其中红色珠子的颗数是白色的 $\frac{1}{7}$ ，黑色珠子的颗数是红色珠子的50%．如果从盒子中任意摸出一颗珠子，摸出黑色珠子的可能性是____．

       Taking away a city's rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can't eat or use. If we kept these things we would soon have a mountain of rubbish.
       In some cities the rubbish is collected and taken outside of the city to a dump(垃圾站). Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathtubs(澡盆) and other places.
        To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you’d never know that this had once been an old rubbish dump.
       In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus(腐殖土), which looks like black earth. It is rich with kinds of things that feed plants and help make them grow.

1. （2014·台州）利用如图装置进行“探究动能大小的影响因素”实验。用两根细绳将小球悬挂起来，拉起小球，当细绳与竖直方向成θ角后松手，小球撞击水平木板上的木块，记下木块移动的距离s。改变角度θ的大小，重复实验。

把下列和“水”有关的诗词名句补充完整。

落霞与孤鹜齐飞,____。

飞流直下三千尺,____。