题目内容
18.A buld-it-yourself solar still(蒸馏器) is one of the best ways to obtain drinking water in areas where the liquid is not readily available.Developed by two doctors in the U.S.Department of Agriculture,it's an excellent water collector.Unfortunately,you must carry the necessary equipment with you,since it's all but impossible to find natural substitutes.The only components required,though,are a 5'×5'sheet of clear or slightly milky plastic,six feet of plastic tube,and a
container-perhaps just a drinking cup-to catch the water.These pieces can be folded into a neat little pack and fastened on your belt.
To construct a working still,use a sharp stick or rock to dig a hole four feet across and three feet deep.Try to make the hole in a damp area to increase the water catcher's productivity.Place your cup in the deepest part of the hole.Then lay the tube in place so that one end rests all the way in the cup and the rest of the line runs up-and out-the side of the hole.
Next,cover the hole with the plastic sheet,securing the edges of the plastic with dirt and weighting the sheet's center down with a rock.The plastic should now form a cone( 圆 锥 体 ) with 45-degree-angled sides.The low point of the sheet must be centered directly over,and no more than
three inches above,the cup.
The solar still works by creating a greenhouse under the plastic.Ground water evaporates (蒸发) and collects on the sheet until small drops of water form,run down the material and fall off into the cup.When the container is full,you can suck the refreshment out through the tube,and won't have to break down the still every time you need a drink.
32.What do we know about the solar still equipment from the first paragraph?B
A.It's delicate.
B.It's portable.
C.It's complex.
D.It's expensive.
33.What does the underlined phrase"the water catcher"in paragraph 2 refer to?A
A.The still.
B.The tube.
C.The hole.
D.The cup.
34.What's the last step of constructing a working solar still?D
A.Dig a hole of a certain size.
B.Put the cup in place.
C.Cover the hole with the plastic sheet.
D.Weight the sheet's center down.
35.When a solar still works,drops of water come into the cup formC.
A.the plastic tube
B.outside the hole
C.beneath the sheet
D.the open air.
分析 本文是一篇说明文,主要介绍了一款简易蒸馏器的建造和使用方法.
解答 32.B推理判断题,根据句子These pieces can be folded into a neat little pack and fastened on your belt.这些碎片可以折叠成一个整洁的小包裹,并系在你的腰带上.说明制整流器的设备很轻便,portable"轻便的,手提的"所以答案选B.
33.A 推理判断题.根据句子Try to make the hole in a damp area to increase the water catcher's productivity.可知最好再潮湿的地方挖洞,以提高节水器的工作效率.在洞的底部放一个杯子,杯子上方用覆盖膜遮挡.所以答案选A.
34.D细节理解题.根据第三段Next,cover the hole with the plastic sheet,securing the edges of the plastic with dirt and weighting the sheet's center down with a rock.可知最后一步是weighting the sheet's center down with a rock"放一块石头在覆盖膜的中间,把它压下去",
35.C推理判断题.结合第四段中的Ground water evaporates (蒸发) and collects on the sheet until small drops of water form,run down the material and fall off into the cup可知地下水蒸发,在覆盖膜上聚集起来直到形成小水滴落在杯子里.覆盖膜是在杯子上面的,水滴落入杯子里.所以水滴是凝聚在覆盖膜的下面.
点评 阅读理解题测试考生在阅读基础上的逻辑推理能力,要求考生根据文章所述事件的逻辑关系,对未说明的趋势或结局作出合理的推断;或根据作者所阐述的观点理论,对文章未涉及的现象、事例给以解释.考生首先要仔细阅读短文,完整了解信息,准确把握作者观点.
-Yes,everything is great and being able to walk to work is an added for me.( )
A. | bonus | B. | budget | C. | bargain | D. | balance |