单词：interstellar rubidium
[天] 星际铷元素
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AS IT IS 2014-02-23 World Digital Library Reaches 9,900 Items 世界数字图书馆达9900项 Hello and welcome to As It Is, from VOA Learning English! Im Steve Ember in Washington. The American space agency NASA launched its first Voyager spacecraft
发表于:2018-12-16 / 阅读(88) / 评论(0)
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SECTION 1: LISTENING TEST (30 minutes) Part A: Spot Dictation Directions: In this part of the test, you will hear a passage and read the same passage with blanks in it. Fill in each of the blanks with
发表于:2018-12-30 / 阅读(245) / 评论(0)
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China has launched two satellites into space on a Long March carrier rocket from the Xichang Satellite Launch Center in Sichuan Province. The satellites are part of the country's growing BeiDou Navigation Satellite System. The launch of the Long Marc
发表于:2019-01-19 / 阅读(162) / 评论(0)
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