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    Everyone has worries. How do you deal with your worries? There is always something you can do to help yourself feel less worried. Sitting there worrying is no fun and it won't solve your problems.

    Grades at school are often a top worry for children. If you worry most about grades, ask yourself these questions:

    ● Why are grades important? What do grades mean to me?

    ● How do I get ready for class? Do I go over my notes even when there isn't a test?

    ● Do I have a good place to do my homework?

    ● Have I tried different ways of studying?

    If your worry is about a fight you had with your friend, you might write down all the things you could do ---- write a note to him or her, invite him or her to watch a basketball game, say sorry to him or her and so on. Once you have a list of things you could do, you can choose one thing that could get your friend back.

    You can ask for help when you're worried. You can find someone to talk to, such as your parents, friends, and teachers.

如图为自然界物质循环示意图，请仔细观察图中内容，回答问题：

动植物的遗体在自然界会逐渐消失，这是因为图中的①____和____（填生物名称）把它分解成____、____和无机盐．这些物质，在光照下，又能被生产者绿色植物通过____作用而利用，进而制造____．再进一步被动物利用．从图中可以看出①对自然界的物质循环有着重要作用，它们作为____参与物质循环．

材料一　实践证明，马克思主义只有与本国国情结合、与时代发展同步、与人民群众共命运，才能焕发出强大的生命力、创造力和感召力。

材料二　我们党坚持马克思主义的思想路线，在实践中不断推进马克思主义中国化。中国特色社会主义理论体系就是马克思主义中国化的最新成果。

公民义务都是以国家强制力为后盾，公民不履行义务都要承担法律责任（     ）