Everyone loves getting cards on their birthday. For Bailey Sellers, the card from her father is a card, one that she'll 1 forever.

    Her father, Mike Sellers, died of cancer in 2013, just a few months 2 her 17th birthday. But her dad made sure he could still 3 her special day, even in death. Before his death he prepaid a flower shop to 4 flowers and a card to her every year on her birthday. The last flowers and 5 came last week, for her 21st birthday.

    In the card 6 came with this year's flowers, Mike Sellers told his daughter, “This is my 7 letter to you until we meet again. You are and will always be the most precious 8 I was given. I will still be with you through every milestone. Just look around and there I will be.”

    9 by her late father's gesture, Sellers posted a photo of the flowers, the card and an old 10 of her dad raising her up on his shoulder during a long ago trip to the beach.

    “Miss you so much daddy,” the post 11, with a little purple heart. The post moved thousands of people, who not only 12 it but also told their own stories of how they 13 the pain of losing a parent. Sellers 14 that pain; she said she became 15 after her father's death. So now she's studying psychology（心理学）, hoping to be able to one day help people get out of the kind of 16 that once enveloped her.

    “He would be so 17 that he pulled off such a beautiful gesture, which offers an important 18 for all of us. He made people 19. He made people realize that they shouldn't take the people who 20 them for granted.”

    场子里一片喧哗。台上，顶碗少年呆呆地站着，脸上全是汗珠，他有些不知所措了。还是那一位姑娘，走出来扫去了地上的碎瓷片。观众中有人在大声地喊：“行了，不要再来了，演下一个节目吧!”好多人附和着喊起来。一位矮小结实的白发老者从后台走到灯光下，他的手里，依然是一摞金边红花白瓷碗。他走到少年面前，脸上微笑着，并无责怪的神色。他把手中的碗交给少年，然后抚摩着少年的肩胛，轻轻摇了一下，嘴里低声说了一句什么。少年镇静下来，手捧着新碗，又深深地向观众鞠了一躬。

如图，在一密闭的圆柱形玻璃杯中装一半的水，水平放置时，水面的形状是（　　）

读沿30°纬线圈的地形剖面示意图（观察者在剖面线以北所见），回答：