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问题 单项选择题

A client is hospitalized with a diagnosis of chronic renal failure. An arteriovenous fistula was created in his left arm for hemodialysis. When preparing the client for discharge, the nurse should reinforce which dietary instruction

A．"Be sure to eat meat at every meal. "

B．"Monitor your fruit intake and eat plenty of bananas. "

C．"Restrict your salt intake. "

D．"Drink plenty of fluids. "

答案

参考答案：C

解析：In a client with chronic renal failure, unrestricted intake of sodium, protein, potassium, and fluids may lead to a dangerous accumulation of electrolytes and protein metabolic products, such as amino acids and ammonia. Therefore, the client must limit his intake of sodium, meat (high in protein), bananas (high in potassium), and fluid because the kidneys can't secrete adequate urine.

单项选择题

At a basic level， cloud computing is simply a means of delivering IT resources as （）.Almost all IT resources can be delivered as a cloud service: applications， compute power， storage capacity， networking，programming tools，even communication services and collaboration （）。

Cloud computing began as large-scale Internet service providers such as Google，Amazon，and others built out their infrastructure. An architecture emerged: massively scaled， （） distributed system resources，abstracted as virtual IT services and managed as continuously configured， pooled resources. In this architecture， the data is mostly resident on （）“somewhere on the Intemet”and the application runs on both the "cloud servers”and the user’s browser.

Both clouds and grids are built to scale horizontally very efficiently. Both are built to withstand failures of （） elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs， with a defined start and end point， cloud services can be continuous. What’s more， clouds expand the types ofresources available —— file storage， databases， and Web services —— and extend the applicability to Web and enterprise applications.

Both are built to withstand failures of （） elements or nodes.

A．entire

B．individual

C．general

D．separate
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问答题 简答题

什么叫压力法滑参数启动？它们有什么优缺点？
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