He didn’t regret saying what he did but

搜题请搜索小程序“爱下问搜题”

问题选择题

He didn’t regret saying what he did but felt that he ____ it differently.

A．could express

B．would express

C．could have expressed

D．must have expressed

答案

答案：C

选择题

已知_aAⁿ⁺、bB^(n+1)-，cC^n-，dD^(n+1)-均具有相同的电子层结构，下列判断不正确的是[ ]

A．元素金属性：B>A，元素非金属性：D>C

B．原子半径：A>B>D>C

C．离子半径：D^(n+1)->C^n->Aⁿ⁺>B^(n+1)-

D．原子序数：b>a>c>d

单项选择题 A1型题

下列属于版权的是（）

A.原产地名称

B.厂商名称

C.服务标记

D.商标

E.工程设计