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问题 单项选择题

羟基位置不同的蒽醌类化合物常用哪种试剂区别

A．5%盐酸水溶液
B．5%NaOH水溶液
C．0.5%醋酸镁醇溶液
D．5%NaHCO3
E．5%Na2CO3

答案

参考答案：C

单项选择题

The client with a total laryngectomy receives tube feedings to meet his fluid and nutrition needs. The nurse explains to the client that the purpose of the tube feedings is to

A. prevent pain from swallowing.
B. prevent fistula development.
C. ensure adequate intake.
D. allow for adequate suture line healin
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单项选择题

《阳关三叠》唱词来自（）所作的诗歌。

A.唐代李白

B.宋代苏轼

C.宋代陆游

D.唐代王维
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