填空题

The Occupational Safety and Health Administration (OSHA) was formed in 1971, and it was placed under the control of ______.

【参考答案】

the Department of Labor

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填空题

Theodore Roosevelt greatly expanded both the national forest and national park systems and created a system of ______.

填空题

Unlike Muir, Pinchot was much more concerned with the use of natural resources to ______.