sul造句怎么写

The synthesis methods of nipagin esters catalyzed by sulfuric acid, p- toluene sulfonic acid, ferric sul-fate hydrate, ferric chloride hexahydrate, aluminium chloride hexahydrate, rare earth compound, solid super acid and heteropoly acid were reviewed.

The loan is repayable over30years and will be used to build an irrigation and drainage system in a5000hectare cotton plantation in the province of kwanza sul a government spokesperson said.