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1、2022年考博英语-西南政法大学考试题库（难点、易错点剖析）附答案有详解1. 单选题A snowfall consists of myriads of minute ice crystals that fall to the ground in the form of frozen precipitation. The formation of snow begins with these ice crystals in the subfreezing strata of the middle and upper atmosphere when there is an adequate sup
2、ply of moisture present. At the core of every ice crystal is a minuscule nucleus, a solid particle of matter around which moisture condenses and freezes. Liquid water droplets floating in the upper atmosphere and free ice crystals cannot coexist within the same cloud, since the vapor pressure of ice
3、 is less than that of water. This enables the ice crystals to rob the liquid droplets of their moisture and grow continuously. The process can be very rapid, quickly creating sizable ice Crystals, some of which adhere to each other to create a cluster of ice crystals or a snowflake. Simple flakes po
4、ssess a variety of beautiful forms, usually hexagonal, though the symmetrical shapes reproduced in most microscope photography of snowflakes are not usually found in actual snowfalls. Typically, snowflakes in actual snowfalls consist of broken fragments and clusters of adhering ice crystals.For a sn
5、owfall to continue, once it starts, there must be a constant inflow of moisture to supply the nuclei. This moisture is supplied by the passage of an airstream over a water surface and its subsequent lifting to higher regions of the atmosphere. The Pacific Ocean is the source of moisture for most sno
6、wfalls west of the Rocky Mountains, while the Gulf of Mexico and the Atlantic Ocean feed water vapor into the air currents over the central and eastern sections of the United States. Other geographical features also can be the source of moisture for some snowstorms. For example, areas adjacent to th
7、e Great Lakes experience their own addition, mountainous sections or rising terrain can initiate snowfalls by the geographical lifting of a moist airstream.1.What is at the center of an ice crystal?2.Which of the following statements is NOT true?3.If a snowfall continues some time since it begins, w
8、e can conclude that（ ）.4.How do lake-effect snowstorms form?问题1选项A.A small snowflake.B.A nucleus.C.A drop of water.D.A hexagon.问题2选项A.A minuscule nucleus is a kind of solid particle of matter.B.The free ice crystals can grow continuously.C.In actual snowfalls, we usually find that simple flakes poss
9、ess symmetrical shapes.D.For a snowstorm, there must be an adequate source of moisture.问题3选项A.there is plenty of moisture.B.there must be a source of water nearby and the temperature will fall.C.the snowflake consists of broken fragments and clusters of adhering ice crystals.D.there are airstreams m
10、otions from over water surface to higher regions.问题4选项A.Water temperatures drop below freezing.B.Moisture rises from a lake into air streams.C.Large quantities of wet air come-off a nearby mountain.D.Millions of ice crystals form on the surface of a large lake【答案】第1题:B第2题:C第3题:D第4题:B【解析】1.细节事实题。根据第一
11、段第三句“At the core of every ice crystal is a minuscule nucleus.每个冰晶的核心都有一个极小的核.”选项B正确。2.细节事实题。根据第一段倒数第二句“Simple flakes possess a variety of beautiful forms, usually hexagonal, though the symmetrical shapes reproduced in most microscope photography of snowflakes are not usually found in actual snowfall
12、s. 简单的雪花有各种美丽的形状，通常是六角形的，尽管雪花在大多数显微镜图像下再生的形状是对称的，但通常在实际的降雪过程中却不是这样的。”由此可知，选项C表述不正确。3.细节事实题。根据第二段一二句“For a snowfall to continue, once it starts, there must be a constant inflow of moisture to supply the nuclei. This moisture is supplied by the passage of an airstream over a water surface and its subs
13、equent lifting to higher regions of the atmosphere. 如果降雪持续不断，必须有源源不断的水分供应核。这种水分是由气流通过水面并随后上升到大气的较高区域提供的。”选项D符合原文。选项A中“plenty”不准确，应该是“constant”；选项B中的温度在文中没有涉及；选项C与题干无关；只有选项D正确，所以本题选D。4.细节事实题。根据上一题的分析“如果降雪持续不断，必须有源源不断的水分供应核。这种水分是由气流通过水面并随后上升到大气的较高区域提供的。”由此可知，选项B正确。2. 单选题Every street had a story, every
14、 building a memory. Those blessed with wonderful childhoods can drive the streets of their hometowns and happily roll back the years. The rest are pulled home by duty and leave as soon as possible. After Ray Atlee had been in Clanton (his hometown) for fifteen minutes he was anxious to get out.The t
15、own had changed, but then it hadnt. On the highways leading in, the cheap metal buildings and mobile homes were gathering as tightly as possible next to the roads for maximum visibility. This town had no zoning whatsoever. A landowner could build anything with no permit, no inspection, no notice to
16、adjoining landowners, nothing. Only hog farms and nuclear reactors required approvals and paperwork. The result was a slash-and-build clutter that got uglier by the year.But in the older sections, nearer the square, the town had not changed at all. The long shaded streets were as clean and neat as when Ray roamed them on his bike. Most of the
