1812年,英国化学家约翰.戴维用一氧化碳与氯气反应合成了光气______.
1812年,英国化学家约翰.戴维用一氧化碳与氯气反应合成了光气,故该说法正确.
故答案为:正确.
下列属于物理变化的是( )
A.石油的分馏
B.制溴苯
C.制硝基苯
D.煤的干馏
听句子,缩写原文。()
A.Many university students prefer soft drinks to fresh fruits.
B.Most of them are first-or-second year college students.
C.A number of college students refuse to disclose their identities.
D.Not many students are interested in our research projects.