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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