The frame needs to be strong enough to support the engine.A. bottom B. structure

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问题 The frame needs to be strong enough to support the engine.

选项 A. bottom
B. structure
C. surface
D. top

答案B

解析frame常见意思是“框，框架”，此处意为“构架，骨架”，与structure同义。bottom是“底部”surface是“表面”top是“顶部”，均不符合。

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