单项选择题

Which of the following, according to the author, should play the leading role in the solution of environmental problems

A．Legislation and government intervention.
B．The industry’s understanding and support.
C．The efforts of environmental health professionals.
D．The cooperation of ecologists, environmental activists and conservationists.

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单项选择题

According to the text, why destruction of our natural resources and contamination of our food supply continue to occur

A．inevitable phenomenon of social developing
B．few people are aware of it
C．the tax exerted on manufacturer is too heavy
D．difficulty in affixing legal responsibility on the people who caused the problem

单项选择题

We can infer from the first two paragraphs that the industrialists disregard environmental protection chiefly because ______.

A．they are unaware of the consequences of what they are doing
B．they are reluctant to sacrifice their own economic interests
C．time has not yet come for them to put due emphasis on it
D．it is difficult for them to take effective measures