变频器主电路电容器主要依据电容量下降比率来判断,若小于初始值的()即需更换。

题型:填空题

问题:

变频器主电路电容器主要依据电容量下降比率来判断,若小于初始值的()即需更换。

考点:高级维修电工高级维修电工题库
题型:填空题

阅读理解。

     Henry finds a job on a farm.  He is the strongest and youngest.  He eats more, sleeps more, but works

  less.  He doesn't like to use his head, so he knows little.  He has to do some unskilled (无需特殊技能

 的) work.  He always says he's tired and hopes to have a good rest.  So he gets less money than others.  

    Winter is coming.  The workers are getting ready for the next year.  Only Henry does nothing.  The

 farmer tells him to cut down some trees in the forest.  The young man has to go there with a chair.  He

 feels lonely (寂寞的) in the forest and is afraid of the animals.  So he looks around and sings loudly.  

 Nobody knows what he's singing.  After three days, Henry doesn't cut down any trees.  The farmer feels

 strange.  He wants to find out how the young man is working there.  To his anger (生气), Henry is sitting

  on the chair, cutting the tree.  "Why are you sitting here to cut the trees?" asks the farmer.  "Because I

 can't work if lying (躺着), sir. "

1. Henry doesn't like to use his head, so _____.

    A.  he knows little knowledge (知识)    

    B.  he is young and strong

    C.  he tries to be a farmer              

    D.  he finds a job on a farm

2. Henry gets less money because _____.

    A.  he sleeps more                  

    B.  he does some unskilled work

    C.  he isn't polite to the farmer        

    D.  he eats more

3. Henry hopes to _____.

    A.  make the farmer happy          

    B.  get help

    C.  lie down in the forest            

    D.  cut down more trees

题型:填空题

蚂蚁是营群体生活的,在这个群体中,不同成员之间有着明确的分工,这种现象体现了生物之间的______关系.

题型:填空题

对客、货机动车超载的行为,《道路交通安全法》规定,公路客运车辆载客超过额定乘员的,处 ()罚款;超过额定乘员20%或者违反规定载货.的,处()罚款。货运机动车超过核定载重量的,处()罚款;超过核定载重量30%或者违反规定载客的,处()罚款。

A.100元以上200元以下,200元以上500元以下,200元以上500元以下,500元以上2000元以下

B.200元以上500元以下,500元以上3000元以下,500元以上1000元以下,500元以上2000元以下

C.200元以上500元以下,500元以上2000元以下,200元以上500元以下,500元以上2000元以下

D.100元以上200元以下,200元以上1000元以下,200元以上500元以下,500元以上2000元以下

题型:填空题

球结摸水肿见于

A.肝炎

B.颅内高压

C.沙眼

D.高血压不伴颅内高压

E.急性肾小球肾炎

题型:填空题

我国长江三角洲地区经济发达,但能源短缺、污染严重,西部地区能源丰富、经济落后,国家决定实施西气东输计划。这个计划的实施要考虑很多问题,例如,多处气源联网互供、大型地下储气库、高质量管道、管道安全、地质状况、发展变化的过程中可能出现的问题等。西气东输计划不仅把很多相关问题统筹综合优化考虑,还考虑到这个计划的未来发展。

结合材料说明这种思维方法的特征?

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