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

2023-07-03

A: bottom
B: surface
C: top
D: structure

参考答案:D

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。