Chinese local dishes have their own typical charateristics. Chinese food can be divided into ________ regional cuisines, the distinction of which is now widely accepted.
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【简答题】比较室温时0.1mol·dm -3 Na 2 CO 3 溶液和0.1mol·dm -3 NaHCO 3 溶液的pH______ (A) NaHCO 3 溶液的pH较大 (B) 两者pH相等 (C) Na 2 CO 3 溶液的pH较大