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【单选题】
下列叙述中，正确的一组是（ ） ①SO 2 的水溶液能导电，所以SO 2 是电解质 ②相同温度下，pH相同、体积相同的盐酸和醋酸溶液分别与足量的锌粒反应，醋酸生成的氢气较多 ③在0.1mol/L CH 3 COOH溶液中加水稀释或加入少量CH 3 COONa晶体，溶液pH均增大 ④室温下，将稀氨水逐滴加入到稀硫酸中，当pH=7时，c(NH 4 + )=c(SO 4 2 － ) ⑤室温下，将pH=5的硫酸溶液稀释1000倍后，溶液中的SO 4 2 － 与H + 的物质的量浓度之比为1:20A.
①③④
B.
②④⑤
C.
②③⑤
D.
②③④⑤
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A.
may accept
B.
can accept
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must accept
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accept
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