如图所示，一理想变压器原、副线圈匝数比n1：n2=11：5．原线圈与正弦交变电源

发布时间：2017-06-29 22:45 │ 来源：www.tikuol.com

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问题：

如图所示，一理想变压器原、副线圈匝数比n₁：n₂=11：5．原线圈与正弦交变电源连接，输入电压μ=220

2

sin（100πt）V．副线圈接入电阻的阻值R=100Ω．则（　　）

A．通过电阻的电流是22A

B．交流电的频率是100Hz

C．与电阻并联的电压表的示数是100V

D．变压器的输入功率是484W

考点：变压器的结构和原理

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2007年4月23日，中 * * 政治局召开会议强调，网络文化单位要自觉担负促进社会主义核心价值体系建设的责任，大力推动马克思主义中国化最新理论成果的网上传播，增强理论宣传的吸引力和影响力。从文化生活角度看，提出上述要求的依据在于（）

A．大力发展先进文化，支持健康有益文化，是社会主义文化建设的重要内容

B．在社会主义文化的百花园中，人人都能享有充满阳光的文化生活

c．在新的历史时期，我国人民的文化生活内容更加丰富，形式更加多样

D．社会主义核心价值体系建设，决定了社会主义现代化的进程

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右室双出口是指

A.主动脉骑跨于室间隔上

B.肺动脉骑跨于室间隔上

C.单心室呈右室形态

D.两条大动脉位置互换

E.主动脉和肺动脉完全或几乎完全起自右心室

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完形填空。

     Computer hackers (黑客) have now got their hands on mobile phones. A phone virus (病毒) can   1 your
phone do things you have no control over, computer security (安全) experts   2 . It might   3 the White
House or the police, or forward your personal address book to a marketing company. Or it could simply eat
into the phone's operating software, turning it   4 and erasing your personal information. Similar viruses have
already made mobile phone owners   5 . in Japan and Europe.
     Ari Hypponen, chief technical officer of a computer security in Finland, said a virus can get your   6 and
send them elsewhere. And it can record your   7 . Mobiles are now able to surf the Net, send emails and  8
software, so they are an easy   9 for the same hackers who have sent viruses to computers over the last
decade. "It's technically   10 now," said Stephen Trilling, director of research at anti-virus 11 maker
Symantec Corp based in the US."If the phone is connected to the  12  , it can be used to transmit threats and
  13   targets, just as any computer can."
     In Japan, if you opened a certain email message   14 your mobile, It would cause the phone to repeatedly
  15 the national emergency number. So phone operators had to   16 emergency calls until the bug was
17 .
     In Europe, mobile's short message service,   18 SMS, has been used to send codes that could damage
phones.
     Mobile users can  19   viruses, of course, by sticking to their traditional phones   20 Web links, some
experts said.

( )l. A. get
( )2. A. speak
( )3. A. lead
( )4. A. off
( )5. A. interested
( )6. A. messages
( )7. A. voice
( )8. A. make
( )9. A. job
( )10. A. impossible
( )11. A. hardware
( )12. A. computer
( )13. A. strike
( )14. A. in
( )15. A. send
( )16. A. cancel
( )17. A. removed
( )18. A. and
( )19. A. stop
( )20. A. beyond

B. force
B. talk
B. cause
B. out
B. angry
B. passage
B. passwords
B. destroy
B. task
B. possible
B. software
B. television
B. visit
B. by
B. dial
B. ban
B. cleaned
B. nor
B. avoid
B. with

C. make
C. tell
C. control
C. down
C. excited
C. news
C. music
C. download
C. mission
C. useful
C. computer
C. Internet
C. inquire
C. on
C. count
C. stop
C. called
C. or
C. kill
C. over

D. damage
D. say
D. call
D. on
D. terrified
D. information
D. address
D. develop
D. target
D. valuable
D. equipment
D. radio
D. attack
D. with
D. press
D. prevent
D. cleared
D. but
D. find
D. without

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（）和（）是女主人公的两个基本动机。

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LTE/EPC系统的架构特点有哪些（）。

A、仅分组域

B、全IP

C、扁平化

D、完全继承3G系统架构

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