输送气体介质的工艺管道采用空气吹扫时,其空气流速不宜小于( )。 A.15m/s

题型:单项选择题

问题:

输送气体介质的工艺管道采用空气吹扫时,其空气流速不宜小于( )。

A.15m/s
B.20m/s
C.25m/s
D.30m/s

考点:造价工程师建设工程技术与计量(安装)建设工程技术与计量(安装工程部分)
题型:单项选择题

阅读理解。

      It was a sunny winter day.  I gone down the tower when a blind man came toward me. He kept close

to the wall, touching it lightly with his arm. I stood still and looked at him walking toward the tower. 

     "What does a blind man want to climb up the tower for7" I wondered. " Not the view ( 景色) certainly,

perhaps he wants to jump. " Thinking of this terrible reason, I thought I should follow him.

      He went up slowly and stopped from time to time.l followed him a few steps behind. When he got to the

first corner of the bell tower, I came close to him. " Excuse me," I said as politely as I could, "but I wonder

why you came up. "

     "You'd never guess," he said.

     " Not the view or the fresh air on this winter day?"

      "No," he said. "Tell me, then.

      " He smiled, " Perhaps climbing up the tower. You have noticed-and yet, not being blind, perhaps you

won't how the sun shines into the tower through the windows here and there, so that one can feel the cool

steps suddenly become quite warm, even in winter. But behind the wall there is shade (阴影). There is no place

so good as this for feeling the difference between light and darkness. Though I'm blind, I also want to feel the

happiness brought by the sunlight. In fact, .it isn't my first time to be here. " He said and seemed as pleased as

a child.

      I had never thought that even a blind man could have his way to enjoy the beautiful life. But we often paid

no attention to its value because we never lost it.

    We went down the tower together and I left him. From then on, I began to treasure what life has given me.

1. The writer met the blind man on___.

A. a sunny winter day

B. a rainy winter day

C. a sunny summer day

D. a rainy summer day

2. The writer thought the blind man wanted to___.

A. see the view

B. breathe the fresh air

C. warm himself

D. jump off the tower

3. What did the writer leam from the blind man?

A. To take exercise.

B. To feel happiness.

C. To enjoy sunlight.

D. To treasure life.

题型:单项选择题

结核病的过敏反应可引起()。

A.多发性关节炎

B.大咯血

C.呼吸困难

D.患侧胸痛

E.以上都不对

题型:单项选择题

常用的软件结构设计工具是结构图(SC),也称程序结构图。其中,用矩形表示______,用带空心圆的箭头表示传递的是数据。

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中国画的分类及艺术特点。

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在正常的工作条件下,设定的受压元件的金属温度称为压力容器的( )。

A.设计温度

B.使用温度

C.试验温度

D.标准温度

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