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Principles of Solar Distiller-2017 New Curriculum Standard Reading Comprehension D Content

Principles of Solar Distiller-2017 New Curriculum Standard Reading Comprehension D Content


Original Title Principles of Solar Distiller-2017 New Curriculum Standard Reading Comprehension D Content Principles of Solar Distiller-2017 New Curriculum Standard College Entrance Examination English Volume I Reading Comprehension D Content D Expand the full text A build-it-yourself solar still 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 US Department of Agriculture it’s an excellent water collector Unfortunately you must carry the necessary equipment with you since it’s all but wiped film evaporator 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 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 (evaporation) 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 wiped film distillation to break down the still every time you need a drink thin film distillation 32 What do we know about the solar still equipment from the first paragraph A It’s delicate B It’s expensive C It’s complex D It’s portable 33 What does the underlined phrase “the water catcher” in paragraph 2 refer to A The tube B The still C The hole D The cup 34 What’s the last step of constructing a working solar still A Dig a hole of a certain size B Put the cup in place C Weight the sheet’s center down D Cover the hole with the plastic sheet 35 When a solar still works drops of water come into the cup from A the plastic tube B outside the hole C the open air D beneath the sheet Answer DBCD Wechat official account Englishtec returns to Sohu to see more Responsible Editor toptiontech.com

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