新gre逻辑阅读 每日一练17

　　新gre考试实施以来，参加了新版gre考试的考生都觉得阅读部分的题难度增加了，这主要是由于新gre考试逻辑阅读需要考生的逻辑反应一定要比以前更快，可能考生还是有点不习惯，或是没有准备充足。那么，接下来的几天，小编将给大家搜索整理一些新gre考试逻辑阅读的练习题，希望考生能从平日的练习中总结规律，找到解题技巧。

　　Eight percent of the Earths crust is aluminum, and

　　there are hundreds of aluminum-bearing minerals and

　　vast quantities of the rocks that contain them. The best

　　aluminum ore is bauxite, defined as aggregates of alumi-

　　5 nous minerals, more or less impure, in which aluminum

　　is present as hydrated oxides. Bauxite is the richest of all

　　those aluminous rocks that occur in large quantities, and

　　it yields alumina, the intermediate product required for

　　the production of aluminum. Alumina also occurs natu-

　　10 rally as the mineral corundum, but corundum is not

　　found in large deposits of high purity, and therefore it is

　　an impractical source for making aluminum. Most of the

　　many abundant nonbauxite aluminous minerals are

　　silicates, and, like all silicate minerals, they are

　　15 refractory, resistant to analysis, and extremely difficult to

　　process. The aluminum silicates are therefore generally

　　unsuitable alternatives to bauxite because considerably

　　more energy is required to extract alumina from them.

　　4. The author implies that a mineral must either be or readily supply which of the following in order to be classified as an aluminum ore?

　　 An aggregate

　　 Bauxite

　　 Alumina

　　 Corundum

　　 An aluminum silicate

　　For the following question, consider each of the choices separately and select all that apply

　　5. The passage supplies information for answering all of the following questions regarding aluminous minerals

　　A Are aluminum-bearing nonbauxite minerals plentiful?

　　B Do the aluminous minerals found in bauxite contain hydrated oxides?

　　□C Are aluminous hydrated oxides found in rocks?

　　6. The author implies that corundum would be used to produce aluminum if

　　 corundum could be found that is not contami-nated by silicates

　　 the production of alumina could be eliminated as an intermediate step in manufacturing alu-minum

　　 many large deposits of very high quality corun-dum were to be discovered

　　 new technologies were to make it possible to convert corundum to a silicate

　　 manufacturers were to realize that the worlds supply of bauxite is not unlimited

　　答案：C/AB

　　以上即是阅读练习题，对于新gre考试逻辑阅读，考生除了采取题海战术，其实更应该做的就是总结。如果能从平日的练习中找到解新gre考试逻辑阅读题的思路，那么，要比采取题海战术更好。