单项选择题

What is the purpose of the honeybee's dance

A．To determine the quantity of food at a site.
B．To communicate the location of food.
C．To increase the speed of travel to food sources.
D．To identify the type of nectar that is availabl

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单项选择题

It can be inferred from the passage that brain size is assumed to ______.

A．be an indicator of cognitive ability
B．vary among individuals within a species
C．be related to food consumption
D．correspond lo levels of activity

单项选择题

It can be inferred from the statement about mother chimpanzees and their young (lines 21—23) that young chimpanzees have difficulty ______.

A．communicating with their mothers
B．adding quantities
C．making choices
D．opening hard nuts