换言之,它有大的自同构群.In other words it has a large automorphism group.有各种各样的 所谓 “ 典范同构 ”.There are various so - called " canonical isomorphisms ".因此我们可以计算同构于其补的图的数目.We may thereby compute the number of graphs which are isomorphi...
Etherification of butanol with ethylene oxide by a new style solide acid catalyst is investigated.研究了丁醇和环氧乙烷在一种新型固体酸催化剂上的醚化反应.The purified rice amylose and amylopectins were obtained by n - butanol recrystallization meth...
Objective To investigate the causations and preventions of stress ulcer after post burn 2 weeks.目的探讨烧伤后期发生应激性溃疡的原因及防治措施.Severe water stress inhibited photosynthetic quantum yield, carboxylation efficiency, electron trans...