单项选择题

A. To probe into the cause of natural disasters.
B. To warn people of the enviromnental conditions.
C. To formulate effective plans to help the victims.
D. To study the influences of natural disasters.
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单项选择题
Which of the following is true about unemployment（）

A. It is caused by too much household borrowing.
B. It is felt more by the poor than by the rich.
C. It gets more seriously than expected.
D. It may be solved if people are optimistic.
单项选择题
A. It is sad that you can find comfort with friends only in Facebook. B. It is convenient to chat with others across communities with Facebook. C. It is terrible to reveal personal feelings in Facebook. D. It is satisfying to find the social norm changing over time with Facebook.
A. It is sad that you can find comfort with friends only in Facebook.
B. It is convenient to chat with others across communities with Facebook.
C. It is terrible to reveal personal feelings in Facebook.
D. It is satisfying to find the social norm changing over time with Facebook.
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