若泵的有效功率为8.25kW,泵的效率为75%,则泵的轴功率为()kW。A、6.2

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问题:

若泵的有效功率为8.25kW,泵的效率为75%,则泵的轴功率为()kW。

A、6.2

B、7.0

C、11.0

D、12.0

考点:汽油加氢装置操作工考试中级汽油加氢装置操作工考试中级汽油加氢装置操作工考试题库
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渗出性胸腔积液,各种不同性质的胸腔积液化验特点是()

A.乳样,乙醚试验苏丹Ⅲ染成红色

B.草黄色微浊,细胞数>500×106/L、蛋白30g/L,LDH300IU/L

C.LDH>500IU/L、LZM(溶菌酶)与ADA(腺苷脱氨酶)正常

D.胸液蛋白/血清蛋白<0.5、LDH<200IU/L、胸液LDH/血LDH<0.6

E.RBC>5×109/L、细胞数<400×106/L

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修复体初戴或粘固后再做一次咬合检查,如果有早接触应及时调整,以消除牙合干扰。

题型:单项选择题
When I was in my first year of middle school, my father died. And my mother was ill just after I got into the high school. I had to   1  going to school because my mother had no money to pay my school bills.
We began to work in people’s gardens to save up money for me to go back to school. Finally I returned to school.my mother __3  the next year. And my world went dark. I asked my headmaster if I could work for the   4 this summer vacation, so I could pay my bills. He was a nice man and let me work in the school garden during the  5 . I can’t study well because of my mother’s death. At the end of my second year, I didn’t  6 most of my exams and the teacher told me I had to repeat the year. After _7  summer working in the school garden, I went   8  to lessons again. But suddenly I fell ill.
Because of my disease (疾病) I was  9  and couldn’t work at school. I was hopeless(无望的). My headmaster told me not to give up. And my teachers and classmates     10  me a lot. Now, I’m feeling better and will finish my third year.
My life is still not   11 . A few students laugh at my poor clothes. They also call me “farmer” because I work in the school garden. But I   12  hard days will always be followed by sunshine.
小题1:
A.stopB.start C.keep D.finish
小题2:
A.and B.but C.soD.although
小题3:
A.goB.dieC.gone D.died
小题4:
A.schoolB.zooC.park D.museum
小题5:A afternoon      B year             C. weekends      D. holidays
小题6:
A.passB.takeC.haveD.give
小题7:.A .others         B. the other       C another         D other
小题8:
A.alongB.backC.down D.up
小题9:A fine           B weak          C healthy         D strong
小题10:
A.helpedB.gaveC.worriedD.taught
小题11:
A.terrible B.hard C.easyD.difficult
小题12:
A.findB.makes C.thinksD.believe
题型:单项选择题

以下()可以通过统计编码方法进行压缩。

A.视频

B.声音

C.图像

D.文字

题型:单项选择题

第二次世界大战初期,德军的铁蹄横扫了北欧、西欧和东南欧。但德军这种“不可战胜”的神话破灭在()

A.莫斯科保卫战

B.斯大林格勒保卫战

C.诺曼底登陆

D.中途岛海战

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