A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural.用糠醇和糠醛缩聚制备了新型呋喃树脂.Resinification of furfural on the catalyst was the main cause of deactivation.糠醛树脂化结焦是导致催化剂失活的主要原因.Fig. 5 Varia...
Fig. 5 Variation of furfural calibration curves in aniline acetate colorimetric method.图5醋酸苯胺比色法,糠醛标准校正线之变化.A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural.用糠醇和糠醛缩聚制备了新型呋喃树脂.The...
尖叫声听得我像针由上到下刺我的脊骨.The scream sent a prickle down my spine.丁斯戴尔爷爷在矿井里工作时被压断了脊骨，结果，下半辈子都与轮椅为伴了。Grandfather Dingsdale had sustained a broken back while working in the mines. Consequently, he spent the rest of his life in a ...
The proctor demanded of him his reason for doing so.学监要他说出做这事的理由。Although disabled by polio during the Second World War, Proctor was also a first-rate helmsman.二战期间尽管身患小儿麻痹症，普罗克特仍不失为一流的舵手。The only new cap is Llanelli...