單項(xiàng)選擇題鹵烴R-Cl、R-I、R-Br發(fā)生反應(yīng)的活潑性順序?yàn)椋ǎ?/strong>

A.R-Cl<R-I<R-Br
B.R-Cl<R-Br<R-I
C.R-I<R-Br<R-Cl
D.R-Br<R-Cl<R-I


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