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原创 我国首颗人造卫星东方红号为何永不坠落?当年专家苦心为此设计
近代科学的目标是什么?就是探求真理。科学方法可以随时随地而改换,这科学目标,蕲求真理也就是科学的精神,是永远不改变的—— 竺可桢 人生之路漫漫,每个心怀梦想的人都曾经是最炙热的少年。任凭风吹雨打,我们依旧心怀赤诚,永不止步。人生是 ...
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