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When an A particle crosses the center of the box, it _ . When a B particle crosses the center, it _ .
blank 1 : a) stops taking part in the reaction
b) changes into a B particle
c) leaves the reaction chamber
blank 2 : a) stops taking part in the reaction
b) changes into a A particle
c) leaves the reaction chamber
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When an A particle crosses the center of the box, it _ . When a B particle crosses the center, it _...
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