题库
题库
A．She engaged in field research on environmental pollution.
B．She helped families move away from industrial polluters.
C．She taught chemistry and microbiology courses in a college.
D．She gave lectures on how to become a public speaker.
| 单选题 | The author’s chief concern about the current U.S. health care system is __________. | 查看答案 |
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| 单选题 | What is the view of the 2004 report in the journal Pediatrics? | 查看答案 |
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| 单选题 | Of the dangers in everyday life, the author thinks that people have most to fear from __________. | 查看答案 |
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