单选题The part of a fuse that melts and opens the circuit is made of （）.Acopper and antimonyBsteel and babbittCaluminum or beryllium alloyDzinc or an alloy of tin and lead
单选题
The part of a fuse that melts and opens the circuit is made of （）.
A
copper and antimony
B
steel and babbitt
C
aluminum or beryllium alloy
D
zinc or an alloy of tin and lead
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