定义在R上的可导函数$f\left(x\right)=x^2+2xf\text{'}\left(2\right)+15$，在闭区间0,m上有最大值15，最小值-1，则m的取值范围是（  ）

一群学生前往北仑港区进行社会实践活动，男生戴白色安全帽，女生戴红色安全帽．大家发现一个有趣的现象，每位男生看到白色与红色的安全帽一样多，而每位女生看到白色的安全帽是红色的2倍．设男生有x人，女生有y人，那么下列数量关系成立的是（　　）

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    “I don't feel right about this,” I said to one of my cousins in a low voice. She nodded in 1 . Not wanting to be the first to touch the food, I waited for one of the older adults to start.

    Thanksgiving usually meant 2  and full stomachs, however, this year was 3. My family sat around the dinner table 4 at our feast. Everyone had a full plate, everyone except for Grandma. The treatment for throat cancer would 5  one of her great pleasures, eating. This was the first 6of many food-focused 7  to come. I could not imagine what it would be like to never taste food again. My cousin Molly broke the 8 with a raise of her glass, “To Nat.” We all followed her lead. “Your 9 and strength encourage us all,” she continued. Grandma smiled, holding back her tears with great 10 . “Thank you. Please, please eat.” And with that, we all began to eat. Conversation broke 11around the room while Grandma laughed and talked with us all. Cancer would take away her ability to eat, but not the gift of being the best hostess. The evening went on as 12 Thanksgivings do. By the time the night was over, I felt 13 to my family than ever before. I learned that we gather together on holidays not to eat rich feast, but to 14 and share with one another. We 15 my Grandmother's courage, but we all learned a lesson in grace. In the years following, my Grandma 16 to create meals for family events. She told me once with a laugh, “I may not be able to eat, but I can 17 taste things.” With a 18 heart, Grandma prepared what she could not have for the only purpose of making us 19 . She inspired me to learn to cook and helped me find the 20 to make everything come together: love.