读表，回答下题。
表        2012年7月19日至22日北京的天气状况

	白天天气	夜间天气	最高气温	最低气温	风力
7月19日	多云	多云	34℃	25℃	微风
7月20日	多云	雷阵雨	31℃	26℃	微风
7月21日	暴雨	多云	31℃	23℃	微风
7月22日	晴	晴	33℃	22℃	微风

    Many people like spring, because they can go out and do many kinds of activities. We made a survey about the activities that people like to do in spring. Here are the results.
Scott：
    In spring, I often visit my uncle and I like fishing with him. I also like boating and enjoy the beach. Last spring my uncle and I went boating. The dolphins came so close to us. It was very amazing. I hope that I can go there again soon.
Linda:
    My favorite spring activity is gardening (园艺). I think it is relaxing to work in the garden. I grow many flowers in my garden every year. They are so beautiful.
Nancy：
    I love spring. I love going to the beach and spending a whole day there. It is so relaxing to lie on the beach. I also like surfing in the sea.
James：
    I am twelve years old. My favorite spring activity is swimming. I started to learn swimming when I was seven years old. I always have a good time with my friends in the river.

给加下划线的词选择词义。（只填序号）

奇怪：A跟平常的不一样。B感到出乎意料，难以理解。

①我奇怪爸爸为什么会得这种病呢？____

②爸爸得了一种奇怪的咳嗽病。____

已知等差数列{a_n}中，a₅+a₇= ${\displaystyle {\int }_0^2\left|1-x^2\right|}$ dx，则a₄+a₆+a₈=____．

如图，把三角板的斜边紧靠直尺平移，一个顶点从刻度“5”平移到刻度“10”，则顶点C平移的距离CC′=____ ．