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The National Transportation Safety Board has recommended the use of fail-safe me
The National Transportation Safety Board has recommended the use of fail-safe me
游客
2025-02-25
50
管理
问题
The National Transportation Safety Board has recommended the use of fail-safe mechanisms on airliner cargo door latches
assuring the doors are properly closed
before takeoff and to prevent them from popping open in flight.
选项
A、assuring the doors are properly closed
B、for the assurance of proper closing
C、assuring proper closure
D、to assure closing the doors properly
E、to assure that the doors are properly closed
答案
E
解析
根据用法，排除A、B、C。D、E比较，由于assure之后不跟动名词，而跟that从句，排除D。
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