SAW振荡器由一组SAW发射、（）、（）组成。

SAW振荡器由一组SAW发射、（）、（）组成。

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Bob saw a boy in a wheel chair without hands． （ ）
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Bob didn’t feel sorry for himself after he saw the boy in the park． （ ）
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()you()Jane last month? B: No, I(). A、*/saw/didn’tB、Did/see/didn’tC、Did/saw/didn’tD、id/see/did
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Michael, you wouldn’t believe what I just saw! It was awful! () A. I know.B. You saw the bus accident?C. That was a really terrible accident.D. Cheer up!
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Decide on the correct stress pattern of the answer to the question: Where did you see him?A．We saw him playing by the river.B．We saw him playing by the river.C．We saw him playing by the river.D．We saw him playing by the river.
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Anyone __________in the exam will be punished.A．seen cheatB．seen cheatingC．saw to cheatD．saw cheating
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When you want to saw metal, （）will be used.A、the hack sawB、the hand sawC、the wood working sawD、wood saw
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锯末（）A、sawB、saw dustC、seeD、see dust
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（）是电磁波发射系统组成的组成部分。A、振荡器、话筒、检波器、发射天线B、振荡器、话筒、调谐器、发射天线C、振荡器、话筒、调制器、发射天线D、调谐器、检波器、接收天线、耳机
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可能造成发射不正常的元件有（）。A、射频功放B、SAW表面滤波器C、天线开关D、射频压控振荡器
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无线通信系统的发射机由振荡器、放大器、（）、（）和功率放大器等组成。
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SAW气敏传感器中，吸附膜吸收了环境中的某种特定气体，使基片表面性质发生变化，导致SAW振荡器振荡频率发生变化，通过测量频率的变化就可检测特定气体成分的含量。
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SAW压力传感器可用以监视心脏病人的心跳，用射频振荡器把信息发射出去实现遥测。
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单选题（）是电磁波发射系统组成的组成部分。A振荡器、话筒、检波器、发射天线B振荡器、话筒、调谐器、发射天线C振荡器、话筒、调制器、发射天线D调谐器、检波器、接收天线、耳机
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单选题When you want to saw metal, （）will be used.Athe hack sawBthe hand sawCthe wood working sawDwood saw
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填空题无线通信系统的发射机由振荡器、放大器、（）、（）和功率放大器等组成。
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单选题Walking down the street the other day,______.AI saw unusual something happenBa terrible accident occurredCsomething unusual was seen by meDI saw a terrible accident
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