Graphics are used in textbooks as part of the language of the discipline, as

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问题     Graphics are used in textbooks as part of the language of the discipline, as in math or economics, or as study aids. Authors use graphic aids to【B1】______and expand on concepts taken up in the text because graphics are yet another way of portraying relationships and【B2】______connections.
    Graphics are used extensively in natural sciences and social sciences. Social scientists work with statistics【B3】______data, and the best way to present these statistics is often in graphic form. Graphics are included not merely as a means of making the information easier for the student to grasp, but as an integral part of the way social scientists think. Many textbooks,【B4】______those in economics, contain appendixes that provide specific information on reading and working with graphic material.
    Make it a practice to【B5】______attentively the titles, captions, headings, and other material connected with graphics. These elements【B6】______and usually explain what you are looking at. When you are examining graphics, the【B7】______questions to ask are(a)What is this item about? and(b)What key idea is the author【B8】______?
    One warning: Unless you integrate your reading of graphics with the text, you may make a wrong assumption.【B9】______, from a chart indicating that 33 percent of firstborn children in a research sample did not feel close to their fathers, you might assume that some dreadful influence was at work on the firstborn children. However, a careful reading of the text【B10】______that most of the firstborn children in the sample were from single-parent homes in which the father was absent. [br] 【B2】

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答案 clarifying

解析 此空前面是表示并列的and,后面是一个名词,因此应该填入一个动名词与前面的portraying relationships构成并列形式,共同作为介词of后面的补足语。clarifying意为“说明,澄清”。
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