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

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

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

答案A

解析本句意思:支撑引擎的框架必须足够坚固。frame意思是“框架,结构”,与structure(结 构,构造)意思相近。bottoni底部,末端;surface表面,表层,外观top顶部,顶端。
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