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【单选题】
What is said about cell phone use in paragraph 4？A.
The number of cell phones in use exploded in the late 1980s and part of the 1990s．
B.
The number of traffic deaths was reduced in the late 1980s and part of the 1990s due to eell phone use．
C.
Cell phone users are likely to be involved in traffic accidents．
D.
The use of cell phones has a life—saving effect for pedestrians and drivers．
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反馈参考答案：
举一反三
【单选题】是护士进行护理科研过程中首先应该考虑的。（）
A.
尊重研究对象的权利
B.
研究对象的心理感受
C.
是否保密
D.
休养环境的物资条件
E.
满足研究对象的各种合理要求
参考解析：
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