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【单选题】
How could 'levels of electromagnetic radiation that exceed international safety standards' be produced?A.
Mobile phones give off a lot of electromagnetic radiation.
B.
Train carriages, buses, and lifts are not safe places to use mobile phones.
C.
A lot of people could use their mobile phones in a confined space at the same time.
D.
Blathering produces radio waves which bounce around the interior of these places.
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【简答题】理想情况下，集成运放的各项技术指标为: AV= [填空(1)] ，Ri= [填空(2)] ，RO= [填空(3)] ，BW从 [填空(4)] 到 [填空(5)] ，KCMR= [填空(6)] ，V＋－V－= [填空(7)] ，I＋—I－= [填空(8)] 。A. B. C. 0D. 0E. F. G. 0H. 0
【简答题】理想情况下,集成运放的各项技术指标为:输入信号为零时,输出端应 ,A uo = ,r i = ,r o = ,K CMR = ,u + -u _ = ,i + =i - = 。
【单选题】The children went home from the grammar school, their lesson _____ for the day.
A.
finishes
B.
finishing
C.
finished
D.
to finish
【简答题】理想情况下，集成运放的各项技术指标为: AV= [填空(1)] ，Ri= [填空(2)] ，RO= [填空(3)] ，BW从 [填空(4)] 到 [填空(5)] ，KCMR= [填空(6)] ，V＋－V－= [填空(7)] ，I＋—I－= [填空(8)] 。A. B. C. 0D. 0E. F. G. 0H. 0
【简答题】理想情况下，集成运放的各项技术指标为: AV= [填空(1)] ，Ri= [填空(2)] ，RO= [填空(3)] ，BW从 [填空(4)] 到 [填空(5)] ，KCMR= [填空(6)] ，V＋－V－= [填空(7)] ，I＋—I－= [填空(8)] 。
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