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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 405

Every device ______in the plane must be designed and made with great care so as to make sure that nothing goes wrong in operation.

A.fitted B.to be fitted C.fitting D.being fitted
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Everydeviceintheplanemustbedes