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1971年3月3日，我国第一颗科学实验卫星“实践一号”发射成功。
历史上的今天40/386
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App01:54![1890年3月4日，苏格兰的标志性建筑福斯桥]正式开通。](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/94dc661b2fdc4ec88e6404574ad0daec~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202411221603572E3ECB365FBEE020ACF6&requestFrom=704&version_code=80402&x-expires=1763798638&x-signature=YA7Ts3C%2F6sa%2FMRxtPxGQ1CImEGI%3D)
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