题目内容

称重系统中信号传输线的屏蔽层应采用（）的方法接地。

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FID的电离室主要由收集极和发射极（极化极）构成，其中（）。

A. 发射极为正极，在喷嘴处
B. 发射极为负极，在喷嘴处
C. 发射极为正极，围绕在火焰外
D. 发射极为负极，围绕在火焰外

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祁连山

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You use a Windows 2000 Professional computer to run a weekly accounts table. The report has the name ap_financial_reports. You also want to use the computer to run a task named perf_log to connect to network routers and retrieve their performance logs. When the ap_financial_reports is running on the computer, the perf_log task stops responding the eventually times out. When you run only the perf_log task, the task completes successfully. You use the task manager to view your system resources. You want to resolve the performance log time out problem by using task manager. What should you do?（）

A. Decrease the base priority of the ap_financial_reports task.
B. Decrease the number of threads available for the ap_financial_reports task.
C. Increase the base priority of the perf_log task.
D. Increase the number of threats available for perf_log task.

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通常我们所用的酸性耐火材料有（）。

A. 半硅砖
B. 铬砖、黏土砖、高铝砖
C. 石英、硅砖
D. 镁砖、铬镁砖、白云石砖、白云石、镁质耐火泥

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