制备O/W型乳剂型基质时，乳化剂的最佳 HLB值为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29785' and id < 2418501 and id<>'2418501' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29785' and id > 2418501 and id<>'2418501' order by id asc limit 5