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【单选题】
乙类双电源互补对称功率放大电路中,若负载上最大输出功率为1 W ,选择功率管的集电极最大耗散功率 P CM 约为:
A.
2W
B.
0.4W
C.
0.2W
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【单选题】Giant Panda Characteristics of Giant Pandas The scientific name of Giant Panda is Ailuropoda melanoleuca, which means 'cat-footed animals in black and white color'. An adult panda can be as tall as 1....
A.
Y
B.
N
C.
NG
【单选题】News that computer chip giant Evell ______thousands of jobs globally has residents in Culver County especially concerned, as the company employs 22,000 people there.
A.
eliminate
B.
eliminates
C.
is eliminating
D.
was eliminated
【单选题】RC有源滤波器中的运算放大器的作用是()。
A.
幅值放大
B.
级间隔离
C.
幅值放大和级间隔离
D.
以上都不对
【单选题】RC有源滤波器中的运算放大器的作用是()。
A.
信号幅值放大
B.
级间隔离
C.
级间隔离和信号幅值放大
D.
以上都不对
【单选题】下列各组词语中,加点字的注音有误的一组是(3分)( )
A.
重 磅 (bàng) 槌 门(chuí) 禀 赋(bǐng)    一 垛 (duò)
B.
褥 子(rù) 桅 杆(wéi) 驯 服(xùn) 颠 踬 (zhì)
C.
锚 索(máo) 痉 挛(jīng) 瞥 见(piē) 堵 塞 (sè)
D.
晕 眩 (xuàn) 飓 风(jù) 剐 破(guǎ) 摇 曳 (yè)
【单选题】听力原文: Computer giant IBM says it will cut up to 13,000 jobs or four percent of its workforce in a cost-saving move specifically targeting Europe. IBM says it will reduce its bureaucracy and scale back...
A.
5 percent of its workforce.
B.
10 percent of its workforce.
C.
1300.
D.
13,000.
【单选题】下列词语中,加点字注音有错误的一组是( )
A.
宁谧(mì) 参差(cī) 枕藉(jiè) 蓦然回首(mò)
B.
思忖(cùn) 赁屋(dài) 气概(ɡài) 卓有成效(zhuō)
C.
鬼祟(suì) 契约(qì) 斟酌(zhēn) 追根溯源(sù)
D.
徘徊(huái) 咳嗽(sòu) 龟裂(jūn) 冠冕堂皇(miǎn)
【单选题】Paragraph 2The fact that electronic computers are now used for data processing has led the general public to believe that it is a mysterious, complicated science and that the computers are giant brain...
A.
A computer is a high-speed adding machine.
B.
A computer is a mysterious giant brain.
C.
A computer is impressive because of its high speed.
D.
A computer is superior to man in many ways.
【单选题】下列轴承合金中,属于巴氏合金的是( )
A.
铜铅合金
B.
锡基轴承合金
C.
青铜
D.
铝基轴承合金
【单选题】The fact that electronic computers are now used for data processing has led the general public to believe that it is a mysterious, complicated science and that the computers are giant brains. Both of ...
A.
A computer is a high-speed adding machine.
B.
A computer is a mysterious giant brain.
C.
A computer is impressive because of its high speed.
D.
A computer is superior to man in many ways .
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