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    Next week is Family Learning Week and there will be many activities (活动) at schools in the city.

    There is a very interesting art class at Hadley School. Its name is "Paint with your parents". It's on Saturday, October 28th. It is for anyone with children under 16. It's a two-hour class it begins at 9:15 in the morning

    An interesting thing about this class is one of the teachers, a famous writer. Her name is J.P. Hayward She will read from her new book. Listening to her will give you ideas to use in your paintings.

    A family ticket (票) is $8. That's for four people. Anyone extra (额外的) has to pay (付费) $3.

    If you are interested in this class, please call Mr. Henry. The phone number is 456-3290. I hope you all enjoy Family Learning Week.

根据材料内容选择最佳答案。

诗歌鉴赏。

《观沧海》

——曹操

东临碣石，以观沧海。水何澹澹，山岛竦峙。

树木从生，百草丰茂。秋风萧瑟，洪波涌起。

日月之行，若出其中；星汉灿烂，若出其里。

幸甚至哉，歌以咏志。

图中哪条曲线能说明正常人在进食前与进食后的一段时间内血糖浓度变化的情况（    ）