下列各式中，不是整式的是（   ）

根据材料内容，选择正确答案。

    Toronto is the biggest city in Canada. It is famous for the CN tower, Niagara Falls(尼亚加拉大瀑布)and some other famous places.

    The CN tower is 553 metres high. It is the world's highest tower. You can stand on a glass floor. Do you think it may break? If you think so, you are wrong, because the glass is very strong. If you look down from the CN tower, you will see a large stadium, the Skydome (天虹体育馆). The Skydome has a special(特殊的) roof(屋顶). The roof can open and close. So don't worry about the rain when you are watching a match there.

    Niagara Falls is one of the biggest falls in the world. It is made up of two falls. One is in the US. People call it American Falls. The other is in Canada. People call it Canadian Horseshoe Falls. The Horseshoe Falls drops from 52 metres high. It is 679 metres long. The sound of the water falling is so loud there. You cannot hear yourself talk! It is very exciting!

如图是某同学在显微镜下观察到的金鱼尾鳍内血流情况，请判断甲、乙、丙三条血管各属于（　　）

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学校长方形的操场长160米，宽40米，沿操场边沿跑两圈是（  ）米。

国务院办公厅日前印发《关于强化学校体育促进学生身心健康全面发展的意见》（以下简称《意见》）。《意见>规定，严禁削减、挤占体育课时间。各地各校要大力推动足球、篮球、冰雪运动等项目，确保学生每天锻炼一小时的校园活动时间，对于学生体质健康水平持续三年下降的地区和学校，将在教育工作评估中实行一票否决。

某校九年级（3）班的同学们想针对本校学生体育健康水平现状开展一次调查活动，请你参与并完成任务。