多聚酶链式反应（PCR）是一种体外迅速扩增DNA片段的技术。PCR过程一般经历下

三角形的内角和等于______．三角形按角分分成：______．

如果刻度尺的零刻线磨损了，它就不能使用了．[      ]

智能家居不能实现（）的实时抄表及安防服务。

A.电子表

B.水表

C.电能表

D.气表

计算机中正在运行的程序和数据存放在_____ 。

A．软磁盘

B．主存

C．硬盘

D．辅存

A 20-year-old woman has just been diagnosed with Crohn’s disease. She has lost 10 lb (4.5kg) and has cramps and occasional diarrhea. The nurse should include which of the following when doing a nutritional assessment（）

A. Let the client eat as desired during hospitalization.

B. Weigh the client daily.

C. Ask the client to list what she eats during a typical day.

D. Place the client on I＆O status and draw blood for electrolyte levels.