IT之家 4 月 29 日新闻?，?据新华社今日晚间报道，中国空间站在轨繁育的首批果蝇克日将随神舟十九号载人飞船返回地球，开展相关研究的我国科学家体现有望获得多项科学效果。

去年 11 月发射的天舟八号货运飞船首次携带果蝇前往中国空间站，作?为一种主要的模式生物，果蝇的许多基因与人类具有相似性，通过研究它们在太空?亚磁和微重力环?境下的生长发育情形?和行为习惯，能够为人类未来恒久在太空生涯等提供理论支持和手艺探索。

据中国科学院生物物理研究所研究员李岩先容?，一个多月的实验共一连培育出5三代果蝇，航天员对每一代都举行了转移操作和采样网络。

这是我国首次在中国空间站里建设果蝇培育平台?并开展科学研究，也是国际上第一次在空?间站中设置空间亚磁情形并探索其生物学效应?。李岩说：“这批注果蝇在太空缺乏重力场和磁场的特殊情形下具备生长发育和求偶交配等滋生能力，为研究太空情形下生物生殖、发育和大脑、行为的影响提供了主要基础，?也为未来人类太空远航的康健包管提供了科学依据。”

别的，科研职员还获得大宗视频数据，用于剖析研究果蝇在空?间情形中的生长发育以及睡眠、求偶等行为特征。

“通过?视频，我们看到了一些与地面完全差别的新的行为模式。由于没有重力，果蝇会泛起飘浮甚至翻跟头的状态，交配乐成率与地面相比也偏低。”李岩说，“飘的同时，果蝇还?会一直地搓腿，这种行为在地面上也?会有，反应了它的焦虑状态，就像人类着急了会挠头。”

IT之家注重?到，去年 4 月上太空的神舟十八号乘组实现了在中国空间站养鱼，?实验海内首次在轨水生生态研究项目，以斑马鱼和金鱼藻为?研究工具，在轨建设稳固运行的空间自循??环水生生态系统，实现我国在太空作育脊椎动物的突破；还实验了国际上首次植物茎尖干细胞功效在轨研究，展现植物进化对重力的顺应机制，为后续定向设计顺应太空情形的空间作?物提供理论支持。

本月发射的神舟二十号载人飞船已搭载再生能力惊人的涡虫前往中国空间站，涡虫和人类基因组的相似度高达 70% 以上，因此研究涡虫关于研究人类细胞战胜老化、延缓朽迈等都具有主要意义。

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• 　　封面圖片來源：視覺中國-VCG211378713200 MACD金叉信號形成，這些股漲勢不錯！ 海量資訊、精準解讀，盡在新浪財經APP責任編輯：張倩
• 圖源來源：DSCC 以折疊屏手機最關鍵的零部件內屏為例，现在，京東方乐成製霸行業
• 大会特殊增添科学效果云展”部分，线上展示内容包括再生医学、合成生物、脑科学、药食同源、抗朽迈医学、双碳科技、海洋生物、人工智能、康健大脑、数字医疗、生物多样性等。
• WASHINGTON — Over the past two decades, Taiwan has slipped from its position atop the list of flash points in the complex relationship between the United States and China. In meetings between President Obama and President Xi Jinping of China, it has typically come up after half a dozen more pressing issues, like trade, cyberattacks and Beijing’s aggressive moves in the South China Sea. Now, though, in a single phone call with the president of Taiwan, Donald J. Trump has thrust it back on the table. Not since President Richard M. Nixon met with Mao Zedong in 1972 — when the two issued the Shanghai Communiqué clarifying the status of Taiwan — has an American leader so shaken up the diplomatic status quo on the issue. “Taiwan is about to become a more prominent feature of the overall U. S. relationship,” said Jon M. Huntsman, who served as ambassador to China during Mr. Obama’s first term. “As a businessman, Donald Trump is used to looking for leverage in any relationship. A President Trump is likely to see Taiwan as a useful leverage point. ” In the short run, Mr. Trump has rattled the entire region. Representatives of several Asian countries contacted the White House on Saturday to express concern, according to a senior administration official. In the longer term, officials in the Obama administration worry that the episode could not just ignite tensions across the Taiwan Strait but also inflame trade relations and embolden China in the South China Sea, where it has clashed with the Philippines, Vietnam and other neighbors over competing claims to reefs and shoals. Mr. Trump expressed no misgivings about taking the call from President Tsai which was arranged beforehand at the initiative of the Taiwanese government, not Mr. Trump’s camp. Mr. Trump bridled at suggestions that he had committed a faux pas, writing on Twitter on Friday evening that it was “interesting how the U. S. sells Taiwan billions of dollars of military equipment but I should not accept a congratulatory call. ” Nor did Mr. Trump or his aides make a gesture to reaffirm the One China policy, much to the chagrin of the White House. It fell to a spokesman for the National Security Council to affirm that the United States was not changing the policy. Under that policy, the United States formally recognized the People’s Republic of China in 1979, abrogating its ties with Taiwan, as the Chinese leader, Deng Xiaoping, sought to bolster China’s economy and create closer ties to the West. Whether Mr. Trump views the call as the beginning of a change in approach toward Taiwan is not clear. A person close to him insisted that he was just being polite in taking Ms. Tsai’s call. But Stephen Yates, a former deputy national security adviser to Vice President Dick Cheney who is advising the Trump transition, said in an interview that people around Mr. Trump were well aware of the nuances of American policy toward Taiwan. Among Republicans, there has always been a push to confront China by reaching out to Taiwan. In a statement on Friday, Senator Tom Cotton, the Arkansas Republican who was briefly believed to be a candidate for Mr. Trump’s defense secretary, praised him for taking the call, saying it “reaffirms our commitment to the only democracy on Chinese soil. ” President Ronald Reagan antagonized China by inviting a delegation from Taiwan to his inauguration. Aides to President George W. Bush pressed him to take a more confrontational approach with China until the attacks of Sept. 11 reordered his priorities, increasing the need for him to cultivate China on counterterrorism and other issues. Tensions over Taiwan peaked under a Democratic president, Bill Clinton, who in March 1996 ordered two aircraft carrier battle groups into the Taiwan Strait after China conducted missile tests to intimidate the island. For some China experts, shaking up the relationship would not be the worst thing in the world. “We have had a status quo of sorts in the Taiwan Strait that has kept the peace, but it recently has not looked all that durable, nor was it very agreeable to most citizens of democratic Taiwan,” said Orville Schell, the director of the Center on U. S. Relations at the Asia Society. “Whether a new kind of Trumpian brinkmanship will now cause China to reconsider its position towards Taiwan, or to respond in a dangerous and militant way, remains to be seen,” he said. Mr. Trump has spoken harshly about China, accusing it of concocting climate change as a hoax to undercut American manufacturers, branding it a currency manipulator (when it in fact is trying to prop its currency up) and threatening to impose a 45 percent tariff on Chinese goods. Mr. Trump’s trade advisers have also advocated punitive responses to what they portray as unfair Chinese actions. A few days after he was elected, however, Mr. Trump spoke with China’s president, Mr. Xi, and released a statement afterward that said the two men had a “clear sense of mutual respect. ” Taiwan is also likely to seek a closer relationship with the United States. After years of a Kuomintang government, which pursued closer China ties, Taiwan elected Ms. Tsai as its second president from the Democratic Progressive Party. Analysts said that Ms. Tsai, though not a firebrand, was seeking to diversify Taiwan’s economic partners and carve out more space for it in international affairs. There are also lingering questions about Mr. Trump’s business dealings in Taiwan. The news media there has reported that the Trump Organization sent a representative to Taiwan to explore building a luxury hotel in a development near Taipei’s airport, though an official with the Trump Organization said it was not planning any expansion into Taiwan. The Trump Organization does not dispute that one of its employees — assigned to promote hotel sales related to Asia — was in Taipei, the capital, in October for a visit. The duties of the executive, Donoghue, include trying to find guests for the company’s hotels worldwide, and she is not involved in developing new real estate projects for Trump Hotels. For the Chinese government, as for many other governments around the world, Mr. Trump’s freewheeling diplomacy poses a challenge. At first, China’s foreign minister, Wang Yi, played down the episode, saying it was a “petty action by the Taiwan side” that would not upset the longstanding policy of One China. But hours later, the Chinese Foreign Ministry lodged a formal complaint with the Obama administration. It urged the United States to “handle issues related to Taiwan carefully and properly to avoid causing unnecessary interference to the overall U. S. relationship. ” David Shambaugh, the director of the China policy program at George Washington University, said Beijing’s measured response made sense. But he said that if the Trump administration took more concrete steps to change ways of dealing with Taiwan, “they can expect additional pushback from China. ”
• 　　外出务工，是外地群众增收的主渠道。全县总生齿32万多，终年外出务工的有7万多人。