To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）<br>A:ground the board<br>B:avoid reversing the polarity of the leads<br>C:isolate sensitive components with heat sinks<br>D:all of the above

To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）
A:ground the board
B:avoid reversing the polarity of the leads
C:isolate sensitive components with heat sinks
D:all of the above

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