在对干熄焦锅炉安全阀进行手动排放实验时,锅筒内的压力应不小于安全阀开启压力值的()。

题型:单项选择题

问题:

在对干熄焦锅炉安全阀进行手动排放实验时,锅筒内的压力应不小于安全阀开启压力值的()。

A.75%

B.80%

C.85%

D.90%

考点:干法熄焦工干法熄焦工题库
题型:单项选择题
One day, a boy fought with one of his classmates.    小题1:  “He is really bad and I hate him.”  the boy said.
The grandfather said, “Let me tell you a story. When I was a boy, I too, sometimes hated others for what they did.  小题2:  It doesn’t hurt(伤害) your enemy (敌人) but only hurt yourself. ”
As the boy listened carefully, the grandfather went on, “There are always two tigers inside my heart. One is good and kind. He gets on well with everything around him.  小题3:   He is full of anger (怒气). Even the smallest thing will make him angry. He fights with everyone all the time, and for no reason. He can’t think carefully because he always hates others.  小题4:  They both try to control (控制)me. ”
The boy looked into his grandfather’s eyes and asked, “Which tiger always controls you, grandfather?”
The old man said slowly in a serious voice, “  小题5: I always feed the good and kind tiger, so I never hate others and seldom get angry now. ”
A.But the other is bad and unfriendly.
B.Then he went to his grandfather and told him his story angrily.
C.But hate will make you feel tired .
D. The one that I feed.
E(AB).It is difficult to live with these two tigers inside my heart.
 
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项目盈亏平衡产销量越高,表示项目( )。

A.投产后盈利越大

B.抗风险能力越弱

C.适应市场变化能力越强

D.投产后风险越小

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You’ll fail your next exam          you start to work hard.

A.because

B.unless

C.so

D.why

题型:单项选择题

对于任意集合 A、B 和C,下述论断正确的是(57) 。

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药用部位是果实的药材是()

A.五味子

B.决明子

C.苦杏仁

D.沙苑子

E.马钱子

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