观察细胞进行有丝分裂时，染色体发生有规律的变化，这些变化的正确顺序是（    ）

①染色质缩短变粗成染色体

②染色体变细伸长成染色质

③组成染色体的DNA复制

④染色体着丝点排列在赤道板上

⑤着丝点分裂，染色体移向两极．

加油男孩（TFBOYS）在2018春晚上演唱了一首歌曲《我和2035有个约》，歌中唱道：“我和2035有个约，约在欢呼雀跃那一天，我亲爱的祖国更加美丽和谐，昂扬屹立新世界。”这个2035到底有什么特殊含义？以下理解正确的是（    ）

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?

Little Red-Cap is helpful. She can w____ the clothes by herself.

设f(x)为定义在R上的奇函数，当x≥0时，f(x)=+2x+b(b为常数)，则f(－1)=