问题 多项选择题

《城镇燃气设计规范》中规定液化天然气储罐安全阀的设置应符合下列要求:()

A.必须选用奥氏体不锈钢弹簧封闭全启式

B.单罐容积为100m或100m以上的储罐应设置2个或2个以上安全阀

C.安全阀应设置放散管,其管径不应小于安全阀出口的管径。放散管宜集中放散

D.安全阀与储罐之间应设置切断阀

答案

参考答案:A, B, C, D

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     "What's the matter, mum?"
     As soon as I enter the door, I find that my mother is   1   . It's unusual -she usually   2   the door and
welcomes me with a smile!
     "She's dying,"mum says sadly. I   3    what she says. The tulip (郁金香),mother's   4   is dying.
      A month ago, we moved   5   our new house and mum bought a very beautiful tulip. Mum liked it very
much.   6   she was free, she would sit   7   her armchair beside the tulip and enjoys its beautiful colour   8  
inviting smell.
     She treated it like a baby and looked after it   9   . She put the tulip by window and moved it from one place
to   10   to give the tulip enough sunshine. The first thing she did when she   11   every morning was  12   the
tulip, Mum also fertilized(施肥)it many times.
     She hoped that with great care, the tulip would become more and more beautiful and   13   . But the tulip
was dying   14   too much sunshine, water and fertilizer.
     It's true that mother loved the tulip. But this kind of love   15   be harmful. Love can sometimes kill what
you love.
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