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jewelry wholesale grand rapids michigan
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30pcs resin jewelry molds wholesale A. Fake gold is copper -zinc alloy. Zinc will react with acetic acid and can be identified, so A is correct;
B. Carbon monoxide is difficult to dissolve in water. Poisoning, so B error;
C. In order to prevent electric shock, the power should be cut off first, and then the fire is extinguished. Polyester is a synthetic fiber. It has a special irritating odor when burning, so D is correct.
The choice: B.