若命题p：2n－1是奇数，q：2n＋1是偶数，则下列说法中正确的是   （   ）

改革开放40年来，我国在经济快速发展、人民生活水平不断提高的同时，贫富差距也在逐步扩大，尤其是城镇居民内部、城乡居民之间的收入差距都比较大。解决贫富差距逐步扩大的问题，我们必须（    ）

根据短文内容理解，选择正确答案。    Hi, I'm Brian. This is the photo of my family. My grandfather is with glasses. He has little hair. The one standing next to him is my uncle. He is wearing a cap. My grandmother has gray hair. She is a kind woman. She is holding my younger brother. He has short curly hair. The woman standing behind me is my mom. She has straight brown hair. There is a little girl sitting on the table. Her name is Cathy. She is my sister. She is wearing a green T-shirt and a pair of green socks. It's her favorite color. Which one is my father? Well, he is wearing glasses, too. He is in brown shorts and brown shoes. His name is Sam. Now, do you know where he is?

已知f（x）= $\frac{1}{2}$ ax²+（b﹣1）x+lnx（a＞0，b∈R）．

《运河与扬子江》作者____，中国第一位新文学女作家 (1893—1976)。笔名____。