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Questions 17—20 are based on the following talk given by a zoologist. You now have 20 seconds to read Questions 17—20. What is the benefit of using the computer chips

A．Tracking the grizzly bears’ course without interfering them.
B．Being very light.
C．Being handy.
D．Tracking the grizzly bears easily.

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单项选择题

单项选择题

Questions 17—20 are based on the following talk given by a zoologist. You now have 20 seconds to read Questions 17—20. What is the benefit of using the computer chips 您的浏览器不支持 audio 元素。