As a physical anthropologist, I have studied early hominid bones and reconstructed specimens of our predecessors.身为体质人类学家, 我曾研究过早期人类及人类祖先的骨头,也曾重建人类祖先的样貌.gracile hominid of southern Africa非洲南部体形纤弱的原始人In 1927, at Chou - k&...
PET fibres were grafted acrylonitrile ( AN ) initiated by benzoyl peroxide.以过氧化二苯甲酰为引发剂,使 丙烯 睛在涤沦(PET ) 纤维上接枝共聚.Initiation is caused by radicals produced from azobisisobutyronitrile, benzoyl peroxide or perester decompos...