下列设备中，哪一种是防爆泄压设备？（） A.阻火器 B.放空管 _爱下问搜题

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问题单项选择题

下列设备中，哪一种是防爆泄压设备？（）

A.阻火器

B.放空管

C.单向阀

D.安全液封

答案

参考答案：B

阅读理解

根据表格中的内容，完成下面报导。

Accident	Big stones fell from the mountain onto a tour bus
Weather	It rained heavily and the wind was strong
Date and time	June 17, 2008, 6 : 20 p. m.
Place	At the foot of north Mountain
Details	95% of the tourists were only hurt a little, seven were hurt badly. All of the wounded tourists were sent to the local hospital. A tourist's four-year-old daughter couldn't be found.

     Good everning! It's 8:50, Garol is here.     1   , thuty minutes ago, a bad accident happened here. Because
of     2   , some big stones fell from the mountain onto a bus. Most of the tourists only     3   themselves a little.
Seven tourists were hurt badly. Unfortunately, a tourist     4   . The police and ambulance arrived in twenty minutes.
Now, all of the wounded visitors have been taken to the local hospital. The police are still    5   the girl who
disappeared(失踪)…

问答题简答题

美国地质学家谁于20世纪50年代最早系统的提出了石油峰值理论，并成功的预测了美国的石油峰值？