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题目内容
The reduction of noise has been (i)_____ in terms of (ii) _____ its sources, but the alternative of canceling noise out by adding sound with the opposite wave pattern may be more useful in practice.
- Ajustified.. diffusing
- Baccomplished.. tracking
- Cconceived.. concealing
- Dexplained.. isolating
- Eapproached.. eliminating
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以上解析由 考满分老师提供。