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在溶剂一定时,沉降系数只与溶质颗粒有关,而与离心机无关。（）

A. 对
B. 错

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Sometimes you'll hear people say that you can't love others until you love yourself.Sometimes you'll hear people say that you can't expect someone else to love you until you love yourself.Either way，you've got to love yourself first and this can be tricky.Sure we all know that we're the apple of our parents' eyes，and that our Grandmas think we're great talents and our Uncle Roberts think that we will go to the Olympics.But sometimes it's a lot harder to think such nice thoughts about ourselves.If you find that believing in yourself is a challenge，it is time you build a positive selfimage and learn to love yourself.Q: Who are the intended readers of the passage?

A. Parents.
B. Adolescents.
C. Educators.
D. People in general.

在《资本论》中马克思指出,资本的文明面之一是,它榨取剩余劳动的方式和条件,同以前的奴隶制、农奴制等形式相比进步性体现在( )。

A. 更有利于生产力的发展
B. 更有利于社会关系的发展
C. 有利于更高级的新形态的各种要素的创造

马克思指出,资本主义生产方式的历史局限性体现在( )。

A. 资本主义基本矛盾阻碍社会生产力的发展
B. 资本主义制度下财富占有两极分化,引发经济危机
C. 资本家阶级支配和控制资本主义经济和政治的发展、运行,不断激化社会矛盾和冲突

马克思认为,资本主义社会同历史上有过的其他社会一样,其产生、发展以及最终被更高级的社会制度替代,是由人类社会发展的一般规律决定的,它是不以人的意志为转移的自然历史过程。

A. 对
B. 错