“军官说：不许争辩，只许操练！税吏说：不许争辩，只许纳税。神甫说：不许争辩，只许信仰。只有一位君主说：可以争辩，随便争多少，随便争什么，但是要听话！”康德引用这段材料是用来（    ）

直线$\left\{\begin{array}{c}x=1+2t\\ y=2+t\end{array}\right.$（t为参数）被圆$x^2+y^2=9$截得的弦长为（  ）

     A woman is having some trouble(患病) with her eyes, so she goes to see the doctor. He is a new doctor and doesn’t know her, so he asks some questions and one of them is, “How old are you?”

     The woman says, “I don’t know, doctor, but let me think about it.” She thinks for a few minutes and then says, “Yes, I know now, doctor! When I marry(结婚), I am eighteen years old, and my husband is thirty. Now my husband is sixty. And that is twice(两倍) thirty. So I am twice eighteen. That’s thirty-six, isn’t it?”