热载体在运行中有自然损耗要及时补加，在（）补加冷热载体。

【名词&注释】

流化床(fluidized bed)、自然损耗(natural loss)、冷热载体

[单选题]热载体在运行中有自然损耗要及时补加，在（）补加冷热载体。

A. A、一边运行一边
B. B、冷炉启动时
C. C、暂时停炉时

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学习资料：

[单选题]锅炉尾部烟道内发生爆燃，主要发生在（）锅炉上。

A. A、油、气、煤粉
B. B、链条炉排上
C. C、固定炉排
D. D、流化床

[单选题]You issued the following commands to configure setting in RMAN;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）

A. The backup will terminate because the FORMAT clause was not configured for the channel
B. It backs up two copies of data files to tape and disk, and two copies of archived log file on tape
C. It backs up the data files and archived log files to disk, making two copies of each data file and archived log file
D. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

[单选题]炉管爆破，不能维持汽包水位时，应（）。

A. 紧急停炉
B. 申请停炉
C. 加强给水

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