问题
选择题
He is generally considered _________the first computer. [ ]
A. to have invented
B. inventing
C. to invent
D. having invented
答案
答案：A
搜题请搜索小程序“爱下问搜题”
He is generally considered _________the first computer. [ ]
A. to have invented
B. inventing
C. to invent
D. having invented
答案：A
2NH3的正、逆反应速率可用各反应物或生成物浓度的变化来表示。下列各关系中能说明反应已达到平衡状态的是 [ ]