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(单选题,2分) Theories have been propos ed by astronomers to( ) electrical disturbances in the atmosphere. A. apply for B. allow for C. account for D. appeal for

(单选题,2分) Theories have been propos ed by astronomers to( ) electrical disturbances in the atmosphere.
A. apply for
B. allow for
C. account for
D. appeal for

题目解答

答案

### 问题解析 这道题考察的是对英语介词短语的理解和应用。题目要求选择一个合适的短语来完成句子,使句子意思通顺且符合逻辑。 句子的背景信息是天文学家提出了一些理论来解释大气中的电扰动。我们需要选择一个合适的短语来填入括号中。 ### 选项分析 - **A. apply for** 意思是“申请”,通常用于申请职位、奖学金等。例如:He applied for a job.(他申请了一份工作。) 这个短语不符合句子的语境,因为天文学家不是在申请电扰动。 - **B. allow for** 意思是“考虑到,留有余地”,通常用于表示在计划或估计中考虑到某种因素。例如:We allowed for traffic delays.(我们考虑到了交通延误。) 这个短语也不符合句子的语境,因为天文学家的理论不是在为电扰动留有余地。 - **C. account for** 意思是“解释,说明”,通常用于表示某事物的原因或理由。例如:The theory accounts for the observed phenomena.(这个理论解释了观察到的现象。) 这个短语符合句子的语境,因为天文学家的理论是为了解释大气中的电扰动。 - **D. appeal for** 意思是“呼吁,请求”,通常用于请求帮助或支持。例如:They appealed for donations.(他们呼吁捐款。) 这个短语不符合句子的语境,因为天文学家不是在呼吁电扰动。 ### 最终答案 根据以上分析,最合适的短语是 **C. account for**,因为天文学家的理论是为了解释大气中的电扰动。 因此,正确答案是 **C. account for**。

解析

本题考查动词短语的辨析,核心在于理解每个短语的含义及用法。句子要求选择一个短语,表示“提出理论来解释现象”。关键点在于区分“apply for”“allow for”“account for”“appeal for”在具体语境中的适用性,尤其关注“account for”在表示“解释、说明原因”时的典型用法。

选项分析

A. apply for

  • 含义:申请(如职位、许可等)。
  • 例句:He applied for a visa.(他申请了签证。)
  • 排除理由:句中天文学家并非“申请”电扰动,与语境无关。

B. allow for

  • 含义:考虑、顾及(通常指为某事预留空间或时间)。
  • 例句:The schedule allows for unexpected delays.(计划考虑了意外延误。)
  • 排除理由:句中理论并非“为电扰动预留余地”,不符合逻辑。

C. account for

  • 含义:解释、说明(原因或现象)。
  • 例句:The theory accounts for the strange behavior of particles.(该理论解释了粒子的异常行为。)
  • 正确理由:句中“提出理论”正是为了“解释”电扰动,与语境高度匹配。

D. appeal for

  • 含义:呼吁、请求(如帮助、支持等)。
  • 例句:They appealed for international aid.(他们呼吁国际援助。)
  • 排除理由:句中天文学家并非“呼吁”电扰动,与语境无关。

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