Since fuse elements are made of zinc or any alloy of tin and lead, the melting point of the fuse element must be （）.<br>A:higher than that of copper<br>B:lower than that of copper<br>C:equal to that of copper<br>D:reached when the conductor it is protecting becomes "white hot"

Since fuse elements are made of zinc or any alloy of tin and lead, the melting point of the fuse element must be （）.
A:higher than that of copper
B:lower than that of copper
C:equal to that of copper
D:reached when the conductor it is protecting becomes "white hot"

出自：海船船员证

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