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题目内容
The noisy begging of a brood of baby birds is a _____ to biologist : why would any helpless, immature organism do something that seems so likely to endanger it by _____ predators?
- AConundrum ; attracting
- BParadox ; outwiting
- CGiven ; drawing
- DSignal ; startling
- EPuzzle ; repelling
A显示答案
以上解析由 考满分老师提供。