問題詳情

請依下文回答第 41 題至第 45 題：Giant pandas have better ears than people — and polar bears. Researchers found out that pandas can 41 surprisingly highfrequencies. The scientists played a range of tones for five zoo pandas trained to 42 a target in response to sound.Training took three to six months for each animal and 43 serious focus and patience, which, according to an expert, was“a lot to ask of a bear.” Both males and females heard into the range of a “silent” ultrasonic dog whistle. Polar bears, theonly other bears scientists have tested, are 44 sensitive to sounds at or above 14 kilohertz. Researchers still don’t knowwhy pandas have ultrasonic hearing. The bears are a 45 bunch, but their chirps and other calls have never been recordedat ultrasonic levels. Great hearing may be a holdover from the bears’ ancient past.
41
(A) taste
(B) hear
(C) see
(D) touch

參考答案

答案：B
難度：簡單0.892226
統計：A(19),B(505),C(21),D(21),E(0)

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