填空题

The human population growth is the causes of all of the environmental problems.

【参考答案】

Y

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填空题

Global warming, the depletion of the ozone layer in the atmosphere, and destruction of the world’s rain forests have made up of all the environmental problems.

问答题

1. 这种做法的意义何在 2．这些大学生能给农村带去什么 3．大学生能从中得到什么