单项选择题

The author seems to believe that the past explanations for taboos concerning eating are______.

A．implausible
B．incomplete
C．ill-founded
D．inelegant
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单项选择题
According to the passage, the shape of the target is reported to the echolocating bat by changes in the ______.
A．echo spectrum of CF signals
B．echo spectrum of FM signals
C．direction and velocity of the FM echoes
D．frequencies of the FM or the CF signals
单项选择题
The word Wunderkind probably means______.
A．box
B．young genius
C．puzzle
D．squeal
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