问题
解答题
正方体的棱长为62.68厘米，从中间挖出棱长为23.5厘米的小正方体，求余下的体积．（结果保留4个有效数字）
答案
62.683-23.53，
=246256.080832-12977.875，
=233278.205832，
=2.33278205832×105≈2.333×105厘米3．
答：余下的体积约为2.333×105厘米3．
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正方体的棱长为62.68厘米，从中间挖出棱长为23.5厘米的小正方体，求余下的体积．（结果保留4个有效数字）
62.683-23.53，
=246256.080832-12977.875，
=233278.205832，
=2.33278205832×105≈2.333×105厘米3．
答：余下的体积约为2.333×105厘米3．
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| 阅读下面这篇短文。根据短文内容，完成表格中空缺的部分，每个空格不得超过两个单词。 Riding the Trans-Siberian Railway Last summer, after completing our work in China, I took a trip of a lifetime on the Trans-Siberian Railway. Leaving Beijing early on a Wednesday morning in July, my wife and I traveled through some awesome (令人惊叹的) countryside before we arrived in Moscow the following Monday. The first leg took us past the Great Wall and through the grasslands of Inner Mongolia. At the Mongolian Republic border, we had a delay (耽误) while the wheels were changed because the railway gauge is a different size. On our way to the capital, Ulan Baator (乌兰巴托), we saw herdsmen on horseback looking after their cattle. There was a spectacular thunderstorm as we crossed a vast open plain. Later we had a quick tour of Ulan Baator. Next, the train took us into Siberia. After a stop at Irkutsk, a popular holiday resort (胜地), where a tour group left the train, we passed a beautiful lake, the Lake Baikal. Later, we saw some lovely wooden houses in pretty, sunny countryside. This surprised us, as we had imagined Siberia as being covered in thick snow. Over the next few days, we passed through Novosibirsk, Omsk and other cities in the heartlands of the Russian Federation. By now, our body clocks were losing their sense of time. We wanted to sleep and eat at the wrong time! At last we reached Moscow. We were too tired and slept for 16 hours that night. The next day we went sightseeing. We saw the Kremlin and some other great buildings in the Russian capital. Then, all too soon, it was time for us to return to our home in London. | |||||||||||||||||||||||||||
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