第一部分 听力部分 （共10题; 每题1.5分，共15分）
一、听下面一段材料，理解所听到的内容，简要回答以下5个问题。本段材料读两遍。
1. question: how can cpr save people?
answer: it 1.___________ and reduces the danger of brain damage.
2. question: what’s the simplified cpr that the american heart association is calling for?
answer: 2._________.
3. question: what’s the appropriate chest press rate?
answer: about 3._________.
4. question: what are chest compressions for?
answer: chest compressions keep the blood 4.__________ and other organs.
5. question: who should use the method according to cpr guidelines from 2005?
answer: 5._________.
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