采用R22的家用空调器制冷运行时,吸气压力(表压力)正常范围为()。

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问题:

采用R22的家用空调器制冷运行时,吸气压力(表压力)正常范围为()。

考点:制冷设备维修工中级制冷设备维修工中级制冷设备维修工题库
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针对项目范围变更控制的行为包括()。

A.对项目在执行过程中完成的各项工作进行及时检查

B.确保正确、满意地完成项目范围变更提及的全部工作

C.争取变更向对自己有利的方向发展

D.按照程序核实确认已经和将要发生的范围变更

E.结合进度、费用、质量控制和合同管理等其他管理任务,妥善处理已经发生的范围变更

题型:填空题

(1)有一列简谐横波在弹性介质中沿x轴正方向以速率v=10m/s传播,某时刻的波形如图1所示,该波的周期T=______s;

振幅A=______m.

(2)一半径为R的

1
4
球体放置在水平面上,球体由折射率为
3
的透明材料制成.现有一束位于过球心O的竖直平面内的光线,平行于桌面射到球体表面上,折射入球体后再从竖直表面射出,如图2所示.已知入射光线与桌面的距离为
3
R
2
.求出射角.

题型:填空题

SS机车在转向制动工况时6台牵引电机各自接成他励发电机状态,励磁电路由6台电机主极全并联和励磁硅整流装置构成。

题型:填空题

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop"

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) She had only one small, flat bag with a few candies—fiftycent candies I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

13()。

A.day 

B.chance 

C.cheque 

D.tree

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税务局相关部门移交的税收违法信息,稽查局经筛选未立案检查的,应当及时告知移交信息的部门;移交信息的部门仍然认为需要立案检查的,()批准后,由稽查局立案检查。

A.经所属税务局领导

B.经所属稽查局领导

C.经上级税务局领导

D.经上级稽查局领导

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