C.For the non-basic organic compound it is preferable to use the aforesaid polyalkylene glycols, polyalkylene glycol monoethers, glycerin, tridecanol, decanediol, etc., among which polyalkylene glycols such as polyethylene glycol, polypropyleneglycol and polybutylene glycol are more preferred, although polyethylene glycol is most preferred.These preferable non-basic organic compounds are liquid at