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问题 单项选择题 A1/A2型题

用酸消解法处理含硒样品时，最适宜的做法是（）。

A.采用回流装置

B.降低消解温度

C.采用减压装置

D.缩短消解时间

E.采用高温快速消解

答案

参考答案：A

解析：回流可防止硒挥发。

选择题

_________ up your shorts.[ ]

A. Hang    

B. Take    

C. Fold
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单项选择题

A client with hypotonic labor dysfunction is receiving oxytoein augmentation. Her contractions become more frequent and intense. Dilation progresses to 8 cm, but the fetal head remains at station +1. The nurse notes a soft bulge just above the symphysis. Which of the following actions is best ？（）

A．Re-evaluate the fetal presentation.

B．Change the client’s position.

C．Offer a narcotic analgesic.

D．Help the client urinate.
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