题型:问答题 简答题 某物质A的分解反应为一级反应,其起始浓度cA,O=0.1mol·dm-3,经50min后分解了CA,O的20%,则反应的速率常数k=( )min-1。若cA,O=0.2mol·dm-3,同样分解cA,O的20%所需时间t=( )min。A.6×10-3,50 (B)B.6×10-3,360.8 查看答案
题型:问答题 简答题 According to the faculty psychologists, understanding and memorization of complicated grammatical rules of languages were regarded as important means of developing ______. 查看答案