题目内容
If you are going to have a journey, you had better _____ get it ready as soon as possible.
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The general purpose oscilloscope is suitable for special-purpose applications.
The general purpose oscilloscope is used in servicing communications, scientific, or industrial work where the frequency of the signal to be observed does not greatly exceed 1000 kHz.
The signal travels directly to the vertical deflection plates of the Cathode Ray Tube (CRT).
Voltage applied to these deflection plates causes a glowing dot to less.
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