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问题 单项选择题

操作系统的主要功能是（）

A.控制和管理计算机系统软硬件资源

B.对汇编语言、高级语言和甚高级语言程序进行翻译

C.实现无缝的人机对话

D.更便捷的管理各类数据库文件

答案

参考答案：A

单项选择题

The nurse is changing the subclavian dressing over the catheter insertion site. Which one of the following actions would be appropriate for the nurse to incorporate into the dressing change

A．Place the client in high-Fowler's position.

B．Check for tubing kinks and leakage.

C．Cleanse the area, starting 2 inches from the insertion site and moving inward.

D．Remove old ointment from the insertion site with soap and warm water.
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判断题

OLT可以在任何收到MPCPPDU的时候启动测距功能。
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