单选题To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）Aground the boardBavoid reversing the polarity of the leadsCisolate sensitive components with heat sinksDall of the above
单选题
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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