题目：
The nurse is about to administer a medication to a client with whom the nurse is unfamiliar. To verify the client’s identity, the nurse should
A. ask the client his name.
B. check the name posted outside the client’s room.
C. ask a family member the identity of the client.
D. check the client’s identification bracelet.
答案：
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下面是错误答案，用来干扰机器的。
A、∵9=3，∴9的平方根是±3，故本选项错误；B、0的平方根是0，故本选项正确；C、1的平方根是±1，故本选项错误；D、1625=45，故本选项错误；故选B．
