Forts and churches almost always go together , and yet they're downright contradictions.有要塞的地方,就一定有教堂, 然而,这两者显然是水火不相容的.The warships opened fire on the forts.几艘军舰向堡垒开火.Forts are framed for defense.建筑城堡是为了防御....
She typed an original and two carbons.她用打字机打出了原件及两份副本.He inserted the paper and two carbons.他放入了那张纸和两张复写纸。Isolable carbocyclic compounds contain seven or fewer carbons in the cycle.可分离的碳环化合物环内含七个或七个以下的碳....
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...