The (i)______of homing pigeons to sense Earth’s magnetic field may serve as (ii)

游客2024-01-10  18

问题 The (i)______of homing pigeons to sense Earth’s magnetic field may serve as (ii)______ tool in helping them find their way home, even across hundreds of miles.

选项

答案 A,E

解析 ability能力,reluctance勉强,unsuitability不恰当;useless无用的,valuable有价值的,undiscovered未被发现的。代入选项,答案选AE。
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