某一供氧系统,平均耗氧量为350m3/h(气态)。每天供气为12h,拟采用液氧罐贮存

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问题:

某一供氧系统,平均耗氧量为350m3/h(气态)。每天供气为12h,拟采用液氧罐贮存。供应商补液氧周期为7d/次,则液氧贮存罐的有效容积至少为()m3

A.38

B.43

C.45

D.52

考点:注册公用设备工程师动力专业案例勘察设计注册公用设备工程师动力专业案例5
题型:单项选择题

There would be a school party on Friday evening. The girls were talking about what they were going to wear.

“I'm going to wear a black dress,so everybody will notice(注意) me,”said Emily. “How about you,Linda?”

“I'm not sure. Maybe jeans(仔裤),an old shirt,and a hat. People will notice me more than you!” Linda said.

“What are we going to do about the boys?” asked Jane. “Do you remember the last school party,last year? They just stood there,and we girls had to dance by ourselves!”

“I hear that some of the boys learned how to dance this summer. Maybe it'll be better this time,”said Mary.

The party was held on Friday evening. Groups of students arrived. The music began. The girls stood in a line on one side,and the boys on another side. Mr. Green,their teacher,tried to get them together,but failed. After a while,Tim said,“I don't want to stand here the whole time. The party is only for two hours. It'll be over soon.” He started to dance. All the others watched him. Then David asked Emily if she wanted to dance. Then Jack and Linda. Then, all began to dance. Soon there were more dancers than watchers.

小题1:On Friday evening there would be __________.

A.a school party   

B.a school meeting

C.a sports meeting  

D.a birthday party小题2:The girls were talking about ___________.

A.what the boys were going to wear at the party

B.what they were going to wear at the party

C.how to teach the boys to dance

D.how to dance小题3:What happened when the music began?

A.David asked Emily to dance.

B.Groups of students arrived.

C.The boys and girls began to dance

D.The girls stood on one side,and the boys on another side.小题4:Who was the first one to dance?

A.David   

B.Jack   

C.Tim   

D.Jane小题5:Did they enjoy themselves in the end?

A.No, they didn’t.

B.Yes, they did.

C.No, they did.

D.Yes, they didn’t.

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人类文化发展的非规律性(文化独立论)

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建设工程概算定额与预算定额的主要不同之处在于( )。

A.贯彻的水平原则不同
B.表达的主要内容不同
C.表达的方式不同
D.项目划分和综合扩大程度不同

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锋上云的降水量在锋下蒸发出来的水汽有时也能凝结成层云或层积云。()

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某企业管理信息系统划分为生产子系统、计划子系统、财务子系统、人事子系统等,这属于MIS按()做的划分。

A.管理职能

B.物理组成

C.横向

D.纵向

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