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SAT官方每日一题附答案和解析[数学](2014年11月15日)

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答案:D

解析:

Since exactly two of the four lines are parallel, the other two lines are not parallel. If the two non-parallel lines intersect at a point that is not on either one of the parallel lines, then the configuration of lines will give a total of 5 points of intersection. (The best way to verify this is by drawing the two parallel lines and then putting in the other two lines.) If, on the other hand, the two non-parallel lines intersect at a point that is on one of the parallel lines, then there will be a total of 3 points of intersection in the figure. (Again, a sketch is the best way to verify this.) Any arrangement of the four lines will again yield either 3 or 5 points of intersection. Since you can’t obtain four points of intersection, the correct answer is I and III only.

重点单词   查看全部解释    
verify ['verifai]

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vt. 查证,核实

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multiple ['mʌltipl]

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adj. 许多,多种多样的
n. 倍数,并联

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distinct [dis'tiŋkt]

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adj. 独特的,不同的,明显的,清楚的

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parallel ['pærəlel]

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adj. 平行的,相同的,类似的,并联的
n.

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figure ['figə]

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n. 图形,数字,形状; 人物,外形,体型
v

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yield [ji:ld]

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n. 生产量,投资收益
v. 生产,屈服,投降

 
obtain [əb'tein]

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vt. 获得,得到
vi. 通用,流行,存在

 
sketch [sketʃ]

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n. 素描,草图,概述,梗概
v. 速写,草拟

 
arrangement [ə'reindʒmənt]

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n. 安排,商议,整理,布置,商定,[音]改编,改编曲

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configuration [kən.figju'reiʃən]

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n. 结构,布局,形态,格式塔心理完形 [计算机] 配置

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