单项选择题

We can learn from the first paragraph that laughter______.

A．can resolve people's opposition to each other
B．is a universal feature shared by human beings
C．plays a biological role unlike other bodily process
D．has nothing to do with people's sense of humor
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单项选择题
What is the Court's attitude towards the government's function in the control of greenhouse gases
A．It is the government's obligation to set up stricter regulation.
B．It is disappointing for the public that the government shies away this problem.
C．The government is the only organization that can control greenhouse gases.
D．The government is not the chief organization authorized to control greenhouse gases.
单项选择题
What will be the result of a more environmentally minded new president be in the place
A．The car industry will be benefited most and will be more profitable.
B．The congress will play less important role in regulating emissions.
C．The 40-year-old law the Clean Air Act will be abolished.
D．The dispute whether CO2 was an air pollutant will be settled.
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