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问题 单项选择题

索引出的详图如果与被索引的详图在一张图纸中，应在索引符号的下半圆中（）。

A、注出详图编号

B、注出详图所在图纸编号

C、画一段水平粗实线

D、画一段水平细实线

答案

参考答案：D

单项选择题

At a basic level, cloud computing is simply a means of delivering IT resources as (1) . Almost all IT resources can be delivered as a cloud service: applications,compute power, storage capacity, networking, programming tools, even communication services and collaboration (2). 　　

Cloud computing began as large-scale Internet Service providers such as Google,Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, (3) distributed system resources, abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on (4) "somewhere on the Internet" 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 (5)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 Service can be continuous. What's more, clouds expand the types of resources available file storage, databases, and Web Service and extend the applicability to Web and enterprise applications.

空白（3）处应选择（）

A.horizontally

B.vertically

C.inclined

D.decreasingly
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问答题 简答题

表示灰渣熔融特性的指标是哪三个温度？
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