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单项选择题

A．To attract more sea animals to the testing site.
B．To drive dangerous sea animals away from the testing site.
C．To help track the sea animals being tested.
D．To determine how sea animals communicate with each other.
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热门试题

单项选择题A．It lacks the necessary background information.B．The man should find the proper subject to research firstly.C．It will be finished in a short time.D．The man doesn’t know how to carry it on.

A．It lacks the necessary background information.
B．The man should find the proper subject to research firstly.
C．It will be finished in a short time.
D．The man doesn’t know how to carry it on.

单项选择题A．They do not work hard at their goals.B．They forget their goals not long after they make them.C．Their life is so busy that they lose focus on their goals.D．They do not have practical goals.

A．They do not work hard at their goals.
B．They forget their goals not long after they make them.
C．Their life is so busy that they lose focus on their goals.
D．They do not have practical goals.