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| 毒品报告 | |
| 摘 要： | A new study examines drug use by young people in the United States. The study found that cigarette smoking among American teenagers dropped during the past year. The drop continues a general decrease in teenage smoking rates that started in Nineteen-Ninety-Six. American health officials praised the decrease as good news in the nation's |
| 本文献已被 CNKI 等数据库收录！ | |