Due to the sustained growth of energydemand and the constant price riseof crude oil in the international market,many countries are actively developing renewabl
Recently experts from scientific research organizations such as Nanjing Agricultural University,JiangsuAcademy of Agricultural Sciences,Jiangsu Research Instit
【正】 Carbon fiber has become the variety oflarge-volume fibers with the highest spe-cific strength and the highest specificmodulus.Its development can upgrade
【正】 Biological pesticides have relatively low toxicity to human health,but their haz-ards to environment should not be overlooked.People usually think that b