搜题请搜索小程序“爱下问搜题”
问题 多项选择题

炉缸燃烧反应在冶炼过程中起什么作用（）

A、提供冶炼所需要的热量。

B、起到渗碳作用。

C、反应生成的CO、H2为冶炼提供间接的还原剂。

D、焦炭燃烧形成煤气，腾出空间，为上部炉料下降创造条件。

答案

参考答案：A, C, D

单项选择题

The (1) is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several (2) . In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a (3) , which consists of (4) indicated using a circle, and (5) shown as a rectangle. These two components can be linked by means of a directed arc.

4（）

A．resources

B．places

C．positions

D．conditions
查看答案
单项选择题

急性脑血管病脑疝形成，最急需的措施是（）

A.脑CT

B.脑MRI

C.腰椎穿刺

D.静脉注射甘露醇

E.脑血管造影
查看答案