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The first use of the principle of the airfoil was ______but in water.A、in airB、
The first use of the principle of the airfoil was ______but in water.A、in airB、
游客
2025-02-04
23
管理
问题
The first use of the principle of the airfoil was ______but in water.
选项
A、in air
B、neither air
C、either in air
D、not in air
答案
D
解析
The paired expression not... but connects two prepositional phrases: not in air but in water.
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