[题目][2013东营]This is 3-D printer. And this is an artificial ear. Can you believe that scientists printed this artificial ear by this 3-D printer?A. a B. an C. the D. / 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】【2013东营】This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?

A. a B. an C. the D. /

【答案】A

【解析】

试题分析：句意:这是一台3D打印机.这是一只人工耳朵.你能相信科学家们用3D打印机打印了这只人工耳朵吗?结合语境可知本句中泛指的是任何一台3D打印机,故用不定冠词.three词首音素是辅音,故不定冠词,用a.选A.

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