What does the passage mainly discuss? Why does the author mention the visible-light microscope in the first paragraph?

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问题 What does the passage mainly discuss?
Why does the author mention the visible-light microscope in the first paragraph?

选项 A、To begin a discussion, of sixteenth-century discoveries.
B、To put the X-ray microscope in a historical perspective.
C、To show how limited its uses are.
D、To explain how it functioned.

答案B

解析本题考查了解文章如何布局，以及各段之间承接关系的能力，属于难度较高的题。文章第一段介绍了显微镜的发展，并由此引出展开，详细介绍了x射线显微镜的发展情况。因此，文章开始提到光学显微镜是为了对显微镜的发展作一个历史回顾。

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考研英语一

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What does the passage mainly discuss? Why does the author mention the visible-light microscope in the first paragraph?

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2016年初某公司“盈余公积”余额为120万元，当年实现利润总额900万元。所得税费用300万元，按10％提取盈余公积，经股东大会批准用盈余公积50万元转增资本，2016年12月31日，该公司资产负债表中盈余公积年末余额为()万元。

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下列施工企业资产中，属于固定资产的是()。

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“没有理性，眼睛是最坏的见证人。”对这句话分析正确的是()。

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WhydoweneedtheEnglishmajor?The【C1】____isineverymouth—or,atleast,isdiscussedextensivelyincolumnsand【C2】