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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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單項選擇題

Tools with （）handles should be used to check electric circuit.

A.plastic
B.metal
C.stainless steel
D.copper

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