Which of the following is a primary cell?
A. Mercury - oxide
B. Lead - acid
C. Nickel - iron - alkaline
D. Nickel - cadmium - alkaline
Answer: A
Which of the following is a primary cell?
A. Mercury - oxide
B. Lead - acid
C. Nickel - iron - alkaline
D. Nickel - cadmium - alkaline
Answer: A
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