The frame needs to be strong enough to support the engine.A: bottomB: surfaceC: topD: structure
The frame needs to be strong enough to support the engine.
A: bottom
B: surface
C: top
D: structure
B: surface
C: top
D: structure
参考解析
解析：题干意为“这个框架要足够结实以便支撑引擎。”句中划线词为名词，意为“框架，结构”。D项structure意为“构造，结构”，例句：Doctors study the structure of the human body．医生们研究人体构造。A项意为“底部”,B项意为“表面”,C项意为“顶部，顶端”，故选D项。
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