1. 預防：至于C,文章第三段提到了疫苗:the flu can be prevented by the fluvaccine. 从这句话可知疫苗是用来预防(prevented)流感的,而题目所要求的是儿童出现了症状以后如何如何,所以C的说法和题意不符.
2. 阻止：Presented 呈递,提供 | Prevented 阻止 | Prioritized 优先化
3. 阻止了：提供了 Presented | 阻止了 Prevented | 采购了 Procured
4. 防止：presented 提出 | prevented防止 | prioritized 区分优先次序
1. If the refurbishing act is not engaged in criminal activity to a crime, it should be prevented using administrative or civil law tools.
2. There are still many other concerns that have prevented policymakers from taking decisive action to shake up the current oil pricing mechanism.
3. She said she was kept " bottled up " from reporters during the campaign and was prevented from delivering a concession speech in Phoenix on Election Night.
4. The canyon's walls prevented them from radioing their positions to their colleagues, just as Serial Two had not radioed its change in plans.
5. " The disease can be prevented if people are careful, " Liu concludes.
6. High coal prices have prevented Chinese power firms and investors from fully cashing in on rampant electricity demand.
7. China Central Television's news channel Thursday showed a boy with AIDS in north China's Liaoning province prevented from going to school.
8. danci.911cha.com
8. Angelina Jolie says her film'Changeling'had so much impact on her, it nearly prevented her trying for another baby.
9. prevented在线翻译
9. The world's No 1 golfer posted a statement on his website saying unspecified injuries prevented him from playing in the Chevron World Challenge.
10. prevented的反义词
10. It can be prevented by treating drinking water with chlorine and improving hygiene conditions.