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问题 单项选择题

“数即宇宙”是以下哪个学派的著名论题（）

A.毕达哥拉斯学派

B.智者学派

C.小苏格拉底学派

D.赫拉克利特学派

答案

参考答案：A

解答题
已知数列{an}的首项a1=2，an+1=2an+2n+1，（n∈N*，n≥1）
（Ⅰ）证明：数列{
an
2n
}为等差数列；
（Ⅱ）设数列{an}的前n项和为Sn，求Sn．
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单项选择题

A certified nursing assistant (CNA) is caring for a client with Clostridium difficile diarrhea and asks the charge nurse, "How can I keep from catching this from the client" The nurse reminds the CNA to wash her hands and to ensure the client is placed

A. on protective isolation.
B. on neutropenic precautions.
C. in a negative-pressure room.
D. on contact isolation.
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