2. 职称英语
  3. Not only________to determine the depth of the ocean floor, but it is also used t

Not only________to determine the depth of the ocean floor, but it is also used t

游客2023-10-22  16
问题 Not only________to determine the depth of the ocean floor, but it is also used to locate oil.
选项 A、to use seismology
B、is seismology used
C、seismology is used
D、using seismology
答案 B
解析 地震学不仅被用来确定海底的深度，还用来确定石油的位置。倒装结构题。Not only放在句首时句子要用倒装语序，系动词、助动词或情态动词要放到主语之前，所以B项为正确答案。A项选项是一个动词不定式，填入空格处句子语法错误；C项选项没有倒装；D项选项是现在分词，填入空格处语法不正确。故B项为正确答案。
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