單項選擇題How do you treat someone suffering from electrical shock after you secure the source?（）
A.check for respiration
B.check for pulse
C.treat for shock
D.All of the above
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1.單項選擇題Tools with （）handles should be used to check electric circuit.
A.plastic
B.metal
C.stainless steel
D.copper
2.單項選擇題Before doing maintenance on electrical equipment, you should （）.
A.turn off power first
B.turn on power first
C.with a test pen in hand
D.tell C/E
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