管线在设计的参数下达到了设计通过量，则输送效率为（）。 - 考试宝

单选题管线在设计的参数下达到了设计通过量，则输送效率为（）。

A、 95%

B、 100%

C、 98%

D、 90%

下载APP答题

由4l***06提供分享举报纠错

相关试题

单选题以下关于输气站干线爆管应急预案编写的选项中，不正确的是（）。

A、编写的重点是爆管的判断及抢险的组织和应急措施

B、爆管预案应包括风险的识别及控制

C、爆管区间各站应按管统一的模板编写

D、应急预案的核心是输气干线爆管的判断和预警、输气干线爆管的应急处置和预案的启动

单选题 His parents had __ money to send him to school when he was young.

A、no

B、some

C、much

D、enough

单选题关于预防管道内燃内爆的措施，不正确的是（）。

A、已经投产的输气管线应定期检查管线内外腐蚀情况,防止壁厚减薄、承压能力降低而引起的爆炸

B、已经投产的输气管线应防止泄漏引起的爆炸

C、在检修过程中,主要是预防氧气不足

D、内爆一般是由于管道内存在有爆炸限内的混合气体加上硫化铁粉的自燃发生的

单选题 He studied hard and __ all his lessons.

A、did well in

B、was poor at

C、was working

D、was good for

单选题 What can we infer about languages in hunter-gatherer times?

A、They developed very fast

B、They were large in number

C、They had similar patterns

D、They were closely connected

单选题 Which of the following best explains "dominant" underlined in paragraph 2？

A、Complex

B、Advanced

C、Powerful

D、Modern

单选题 How many languages are spoken by less than 6,000 people at present？

A、About 6,800

B、About 3,400

C、About 2,400

D、About 1,200

单选题 He found the boy __ and had pity on him and lent some money to him.

A、lazy

B、clever

C、careful

D、hard