数控机床主轴()线数一般是1024线。 A.编码器 B.电机 C.驱动器 D.同步轮

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问题:

数控机床主轴()线数一般是1024线。

A.编码器

B.电机

C.驱动器

D.同步轮

考点:数控机床装调维修工数控机床装调维修工(高级)数控机床装调维修工(高级)题库
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在连接串联电路、并联电路的实验中,小张同学将两只灯泡、一个开关与电池连成了一个电路.闭合开关后,小张同学发现两灯都不亮,经检查,发现原因是一只灯泡与灯座接触不良.小张同学将这只灯泡重新安装好后,再次闭合开关,两灯都亮了.由此可以判定,两灯的连接方式(  )

A.一定是串联

B.一定是并联

C.可能是串联,也有可能并联

D.无法判断

题型:单项选择题
如图所示,理想变压器原、副线圈的匝数比为10:1,b是原线圈的中心接头,电压表V和电流表A均为理想电表.从某时刻开始在原线圈c、d两端加上交变电压,其瞬时值表达式为u=220sin100πt(V).下列说法正确的是(  )

A.当单刀双掷开关与a连接时,电压表的示数为22V

B.当单刀双掷开关与b连接时,电压表的示数为11V

C.当单刀双掷开关与a连接,滑动变阻器触头P向上移动的过程中,电压表的示数不变,电流表的示数变大

D.单刀掷开关由a扳向b时(滑动变阻器触头P不动),电压表和电流表的示数均变大

题型:单项选择题

关于躁狂发作的特点,错误的是()

A.情感高涨

B.易激惹

C.病理象征性思维

D.夸大妄想

E.精神运动迟滞或激越

题型:单项选择题

代谢药物的主要器官是()

A.肠粘膜

B.血液

C.肌肉

D.肾

E.肝

题型:单项选择题

Bill Gates receives honorary knighthood


Britain’s Queen Elizabeth stands with Microsoft chairman and philanthropist Bill Gates after presenting him with an honorary knighthood at Buckingham Palace, London, March 2, 2005.
Sir Bill Not quite. Proclaiming himself "humbled and delighted," Microsoft founder Bill Gates received an honorary knighthood Wednesday from Queen Elizabeth Ⅱ—an accolade that allows the recipient to use "KBE" after his (1) , but not to put "Sir" in front of it.
One of the world’s richest men, Gates, 49, was (2) honored for his charitable activities around the world and his contribution (3) enterprises in Britain.
Past recipients of the honorary knighthood (4) from Irish singer Bob Geldof to former U.S. President Ronald Reagan.
"This (5) is particularly poignant given the deep connections Microsoft enjoys (6) the United Kingdom," said Gates, whose company employs about 2000 people in (7) .
Gates’ royal honor—bestowed by the queen on the advice of the (8) —was announced in January 2004, but a "mutually convenient" date to (9) it had not been available until now.
British recipients of knighthoods are entitled to be (10) with a "Sir" before their names. The honor was long the (11) of senior soldiers, judges and other servants of the state, but recent years have seen the creation of Sir Paul McCartney, (12) Mick Jagger and Sir Elton John.
As an American, Gates is not entitled to use (13) before his name, but he can put the initials KBE—Knight Commander of the (14) Empire—after his name.
Gates joins a roster of American (15) that includes former presidents Reagan and George H.W. Bush, comedian (16) Hope, retired U.S. Army Gen. Tommy Franks and former Secretary of (17) Colin Powell.
Gates said he was proud of what he called (18) "special relationship" with Britain.
"The U.K. was the first country in (19) Microsoft set up a subsidiary outside the U.S., and our experience in the (20) has been significant in shaping our international growth," he said.
Microsoft’s British facilities include Research Cambridge, a laboratory established in 1997 in the university town that employs 80 scientists. In 2000, the Bill & Melinda Gates Foundation announced a donation of $210 million to Cambridge University to create a scholarship program for graduate students from outside Britain.

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