注意：为了使同学们更好地解答本题，我们提供了一种解题思路，你可以依照这个思路按下面的要求填空，完成本题的解答．也可以选用其他的解题方案，此时不必填空，只需按照解答题的一般要求进行解答．

方案一：甲队单独完成这项工程刚好能够如期完成；

方案二：乙队单独完成这项工程要比规定的时间多用10天；

方案三：若甲、乙两队合作8天，余下的由乙队单独做也正好如期完成．

又从甲、乙两个工程队的投标书中得知：每天需支付甲队的工程款1.5万元，乙队的工程款1.1万元．

试问，在不耽误工期的前提下，你觉得哪一种施工方案最节省工程款？请说明理由．

解题方案：

设甲队单独完成需x天，则乙队单独完成需（x+10）天．

（1）用含x的代数式表示：

甲队每天可以完成这项工程的工作量是工程总量的______

乙队每天可以完成这项工程的工作量是工程总量的______

根据题意，列出相应方程______

解这个方程，得______

检验：______

（2）方案一得工程款为______；

方案二不合题意，舍去

方案三的工程款为______

所以在不耽误工期的前提下，应选择方______能节省工程款．

The pyramids Some of the most interesting building in the world are the pyramids. The pyramids stand huge and silent, and in modern days, people look at them and wonder, "Who built them’ Why When What is in- side’ How did they do it " Thousands of years ago in Egypt, kings built the pyramids. They used to build them as (1) ______. The kings [1] ______thought the pyramids would help them find life after (2) ______, [2] ______-- ,and join Ra in his journeys (3) ______ life sky. [3] ______ They also wanted the world to remember them as important peo- ple. Some pyramids were found by thieves who in fact found their way into the pyramids and into most of the pharaoh’s tombs. The tombs were still full of treasure. [4] ______ There are many pyramids along the (4) ______ River. [5] ______The (5) ______ is the pyramid of Khufa. It is made of 2,300, [6] ______ 000 huge (6) ______ ,most of them higher than a person, It is about 144 meters high. Inside the pyramid are the burial rooms for the king and queen and long passageways to these rooms. The rest of the pyramid is solid stone. [7] ______ Workers usually built the pyramids when the flood began in (7) ______ and they could not work on their farms. To build the pyramid of Khufu, 100,000 men worked for twenty years. We know there were wonderful treasures in the pyramids:Robbers went into the pyramids and took many of these treas- ures. Today some of the treasures are in museums, though. How did the people of ancient days build the pyramidsHow did they carry and lift the huge stones Each stone fit so [8] ______ well and they didn’t have our modern machines! The ancient [9] ______ (8) ______ in Egyptian tombs give us some ideas. The workersused (9) ______, levers and rollers to move stones. Besides [10] ______ the Egyptian pyramids, there are also great pyramids in (10) ______ which were used for human sacrifice and different from Egyptian tombs in shape and other aspects.