对比阀前、阀后真空度检测仪表数值与真空度变化前的显示值,如两个数值都增长很多,可能是

题型:多项选择题

问题:

对比阀前、阀后真空度检测仪表数值与真空度变化前的显示值,如两个数值都增长很多,可能是()漏气、蒸汽或真空泵出现问题。

A.仪表显示错误

B.设备泄漏

C.蒸汽压力不足

D.真空泵体系出现问题

E.大气压异常

考点:炉外精炼工初级炉外精炼工初级炉外精炼工题库
题型:多项选择题
有关热学知识,下列说法正确的是(  )

A.温度高的物体比温度低的物体具有的内能和热量多

B.运载火箭采用液态氢作燃料,原因是液态氢具有较大的热值

C.塑料吸盘能牢牢地吸附在玻璃上,说明分子间存在着引力

D.吸收热量多的物体的比热容大

题型:多项选择题

语法填空。

     There are moments in life 1.________ you miss someone so much that you just want to pick

them from your dreams and hug them for real!

     When the door of happiness closes,2.________ opens,but often we look so long at the

closed door 3.________we don't see the one which has been opened for us.

     Don't go for looks; they can deceive.Don't go for wealth; even that fades away.Go for

someone 4.________ makes you smile because it takes only a smile to make a dark day

seem bright.

     Dream what you want to dream; go where you want to go; be 5.________ you want

to be.

     The 6.________(happy) of people don't 7.________(necessary) have the best of

everything; they just make the most of everything that 8.________(come) along their way.

The brightest future will always be based on a 9.________(forget) past.

     When you were born,you were crying and everyone 10.________you was smiling.

Live your life so that when you die,you're the one who is smiling and everyone around you

is crying.

题型:多项选择题

自力式调节阀在工艺管线上安装反向对控制没有影响。

题型:多项选择题

当今时代的内涵是()。

A、共赢

B、发展

C、合作

D、和平

题型:多项选择题

城市的特征是

A.人为性和不完整性

B.复杂性和脆弱性

C.聚集性与稀缺性

D.分散性和复杂性

E.完整性和脆弱性

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