On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.

A、mimimum oxygen content line

B、critical displacement line

C、critical dilution line

D、upper threshold limit

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更多“On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.”相关的问题

第1题

[单选题] You are working on the APPDB database as a DBA. The database has a default Flashback Data Archive DFLA1 created on it. You issued the following command to drop the Flashback Archive FLA1: DROP FLASHBACK ARCHIVE fla1,What is the effect of this command?（）

A、The Flashback Archive FLA1 is dropped only if it is empty. B、The tablespace having Flashback Archive is dropped. C、The Flashback Archive FLA1 is dropped after moving the existing data in it to the default Flashback Archive. D、The Flashback Data Archive and historical data are dropped.

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第2题

[] You are working on the APPDB database as a DB A. The database has a default Flashback Data Archive DFLA1 created on it. You issued the following command to drop the Flashback Archive FLA1： DROP FLASHBACK ARCHIVE fla1； What is the effect of this command？（） You are working on the APPDB database as a DB A. The database has a default Flashback Data Archive DFLA1 created on it. You issued the following command to drop the Flashback Archive FLA1： DROP FLASHBACK ARCHIVE fla1； What is the effect of this comm

A、A. The Flashback Archive FLA1 is dropped only if it is empty. B、B. The tablespace having Flashback Archive is dropped. C、C. The Flashback Archive FLA1 is dropped after moving the existing data in it to the default Flashback Archive. D、D. The Flashback Data Archive and historical data are dropped.

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第3题

[单选题] On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.

A、minimum oxygen content line B、critical displacement line C、critical dilution line D、upper threshold limit

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第4题

[单选题] Flash动画的源文件的后缀名是（），而导出生成的可发布的动画文件的后缀名是（）。

A、FLA、SWF B、SWF、FLA C、AVI、EXE D、EXE、AVI

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第5题

[单选题] The atmosphere in a tank is too lean if it is（）.

A、incapable of supporting combustion because the hydrocarbon content is below the LFL (Lower Flammable Limit) B、capable of supporting combustion because the hydrocarbon content is above the UFL (Upper Flammable Limit) C、capable of supporting a fire once started D、not safe for ballasting