三相交流电各相最大值,频率祖同。相位差120度。()

题型:判断题

问题:

三相交流电各相最大值,频率祖同。相位差120度。()

考点:电机装配工中级电机装配工中级
题型:判断题
A terrible earthquake happened in Wenchuan on May 12, 2008. 42 people lost their lives and homes. During those days, we could hear a lot of stories about 43. Here is 44 of them. After the earthquake, under a fallen building, some soldiers found that a 45 died in a very strange way. When they were ready to take her away, they were surprised to find that a baby in her arms was still 46. The baby was sleeping and 47 hurt(受伤) at all. Between the dead mother _48 the living baby, there was a cellphone (手机) with a short 49 on the screen, “My dear baby, if you can survive (幸存) , remember that I love you.” Everybody 50 when they read these words.
Besides this story, many other stories also moved (感动) us deeply. 51 these stories, we learn more about love.
You’re lucky if you’re loved by others. You’re great if you love others when you’re in danger.
小题1:
A.All B.Many C.Few D.No
小题2:
A.home B.life C.love D.hope
小题3:
A.one B.none C.some D.each
小题4:
A.man B.woman C.boy D.girl
小题5:
A.alive B.live C.life D.lives
小题6:
A.is B.isn’t C.was D.wasn’t
小题7:
A.or B.but C.alsoD.and
小题8:
A.story B.film C.message D.song
小题9:
A.smiledB.shoutedC.laughedD.cried
小题10:
A.From B.On C.To D.With
题型:判断题

(1)有一待测的电阻器Rx,其阻值约在40~50Ω之间,实验室准备用来测量该电阻值的实验器材有:电压表V(量程0~10V,内电阻约20kΩ);

电流表A1,(量程0~500mA,内电阻约20Ω);

电流表A2,(量程0~300mA,内电阻约4Ω);

滑动变阻器R1,(最大阻值为10Ω,额定电流为2A);

滑动变阻器R2(最大阻值为250Ω,额定电流为0.1A);

直流电源E(电动势为9V,内电阻约为0.5Ω);

开关及若干导线.

实验要求电表读数从零开始变化,并能多测出几组电流、电压值,以便画出I-U图线.

①电流表应选用______.

②滑动变阻器选用______(选填器材代号).

③请在如图甲所示的方框内画出实验电路图,并将图乙中器材连成符合要求的电路.

(2)读出丙图游标卡尺的读数为______mm

题型:判断题

AGC投入后,值班员可酌情修改主汽压力设定值,保持机组各参数的稳定。

题型:判断题

国内特快专递业务档案包括的内容有()。

A.各种业务单据

B.清单路单

C.邮件结算平衡表

D.相关登记簿

题型:判断题

患者,男,40岁素有高血压病史,现眩晕耳鸣,面红头胀,腰膝酸软,失眠多梦,时有遗精或性欲亢进,舌红,脉沉弦细其病机是()

A.阴虚内热

B.阴损及阳

C.阴虚阳亢

D.阳损及阴

E.阴虚火旺

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