销售净利率是20%，资产周转率是1次，权益乘数是2，则净资产收益率是40%_答案

【判断题】

销售净利率是20%，资产周转率是1次，权益乘数是2，则净资产收益率是40%

A. 对

B. 错

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B. 装在电子舱的E3架上部，客舱高度大于14000FT时自动放氧气面罩

C. 装在电子舱的J23盒内，客舱高度大于10000FT时自动放氧气面罩

D. 装在电子舱的E3架上部，客舱高度大于10000FT时自动放氧气面罩

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【单选题】

(B737ng)关于737NG旅客氧气高度电门说法正确的是___

A. 装在电子舱的E3架上部，客舱高度大于14000FT时自动放氧气面罩

B. 装在电子舱的J23盒内，客舱高度大于10000FT时自动放氧气面罩

C. 装在电子舱的E3架上部，客舱高度大于10000FT时自动放氧气面罩

D. 装在电子舱的J23盒内，客舱高度大于14000FT时自动放氧气面罩

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【单选题】

(B737ng)机组氧气瓶什么时候会安全释放: ___

A. 1850PSI

B. 10OOPSI

C. 18OOPSI

D. 2600±l50PSI

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【单选题】

(B737ng)旅客氧气发生：___

A. 可用拔氧气系统跳开关来停止

B. 可用放回氧气面罩于贮藏盒中来停止

C. 可按压P5板上的复位电门来停止

D. 一但起动就不能停止

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