The professor held the crucible the Bunsen flame when heating the substance.A. in B. above C. beside D. over 题目和参考答案——青夏教育精英家教网—

题目内容

The professor held the crucible the Bunsen flame when heating the substance.

A. in B. above C. beside D. over

【解析】

试题分析：考查介词。above只表示在上方或位置高出与below相对；over有覆盖在上,越过,正上方之意与under相对。根据句意，是在火焰之上，故用over

考点：考查介词。

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