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中国长三甲系列运载火箭实现100次发射******

原标题:中国长三甲系列运载火箭实现100次发射

中新网四川西昌4月20日电(郭超凯)北京时间4月20日22时41分,中国自主研制的长征三号乙运载火箭在西昌卫星发射中心点火起飞,成功将北斗三号系统首颗倾斜地球同步轨道卫星送入太空。中国长征三号甲系列运载火箭(以下简称长三甲系列火箭)的发射次数正式刷新为100次,截至目前,这是长征系列运载火箭家族中唯一达到百次发射的单一系列火箭。

郭文彬 摄

据介绍,长三甲系列火箭由长征三号甲、长征三号乙、长征三号丙三种低温液体运载火箭组成。该系列运载火箭包揽了目前中国绝大多数高轨道航天器发射任务,是长征系列运载火箭高强密度发射的“主力”,不仅是中国目前高轨道上发射次数最多、成功率最高的火箭系列,同时也多次承担了商业卫星的发射任务,被誉为中国的“金牌火箭”。

郭文彬 摄

“长三甲系列火箭100次发射的成功率为98%,这是和世界任何一个火箭型号发射成功率相比都名列前茅的成绩。”中国航天科技集团一院长三甲系列火箭总指挥岑拯说。

自1994年2月8日,长征三号甲火箭圆满完成首飞任务以来,长三甲系列火箭型号已经走过了辉煌的25年,在探月工程、北斗工程和国际商业发射服务中发挥了重要作用。

郭文彬 摄

中国航天科技集团一院长三甲系列火箭总设计师、中国科学院院士姜杰在接受中新社记者采访时表示,在长三甲系列火箭100次发射中,有36次执行北斗工程发射任务,成功将44颗北斗导航卫星、4颗北斗导航试验卫星送入轨道(其中12次是“一箭双星”);有5次执行探月工程,成功将嫦娥一号、嫦娥二号、嫦娥三号、嫦娥四号、嫦娥五号载入返回飞行试验器送入地月转移轨道;有36次执行通信卫星工程,发射36颗通信卫星;有7次执行气象卫星工程,发射7颗风云气象卫星;有16次执行国际发射任务,发射16颗国际商业卫星。

月亮与火箭的合影。郭文彬 摄

用于执行第100次发射任务的长征三号乙运载火箭由中国航天科技集团一院抓总研制,此次发射的北斗三号倾斜地球同步轨道卫星由中国航天科技集团五院抓总研制。(完)

西安女子办了绿地世界中心退房退款手续 34万元迟迟拿不回******

定购房子后不到一个月就办理了退房退款手续,但原本去年11月就该拿到的退款却被一拖再拖,甚至在相关部门督促后,开发商承诺给退给骆女士的34万元仍旧不见踪影。

2021年5月1日,骆女士和母亲在绿地世界中心售楼部看房,经置业顾问介绍,选了绿地国宝21城三期的一套房子,当天就与绿地集团西咸新区绿源置业有限公司签订定购协议,并缴纳了34万购房款,开发商出具了房款交款确认单。“后来我们认为房子与宣传不符,就想退房”,她说,与开发商达成一致后,于当月21日办理了退房退款手续。“绿地集团西北事业部退房、退款确认单”上载明:自客户提交资料齐全之日起,开发商需在3-6个月内将客户所缴纳的认购款34万元整退还给认购人。

骆女士说,之后她通过置业顾问询问开发商相关负责人,得到的答复还没到时间。在去年10月28日,她在人民网领导留言板反映了此事。

去年11月5日,西咸新区管委会回复:收到您的留言后,西咸新区高度重视,立即对接绿地国宝21城项目了解情况,现将有关事宜回复如下:“您2021年5月购买绿地国宝21城一套房源,缴纳34万元购房款,又于2021年5月21日办理退款手续,至今还未到账,希望有关部门协调。经了解,您反映问题属实。相关部门已督促开发企业尽快退回您购房款,现绿地世界中心负责人承诺于2021年11月30日前完成退款。工作人员于2021年11月1日回电您,您表示满意。”

本以为事情很快就会解决,可至今骆女士仍未拿回退款。她出示了去年11月30日与开发商王姓经理的短信,对方答复:“刚才问财务了,他们说今天月底最后一天审计在查账,预计本周五退。”去年12月3日回复:“财务说审计内部还没审完,说这几天就能退!你也不要太着急”……骆女士说,其后她又多次发短信,对方也不再回复。

“我母亲因此事气急攻心,已经病倒,家里急需用钱,可开发商却一拖再拖!”骆女士说,与她情况类似的还有多人。她提供了多张网页截图,均为网友在领导留言板反映绿地西安世界中心拖欠退房款或定金。

2022年2月25日下午,华商报记者联系了开发商王姓经理,他称此事不太方便说,自己还有事,随即挂断电话。空港新城住建局工作人员答复记者说,此事他知道,该笔款项将在3月10日之前退给骆女士。

华商报记者 宁军


来源:华商网-华商报

编辑:方正

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被封印在琥珀中1亿年的螃蟹成为最古老的水生动物化石******

国际研究小组在一枚琥珀中发现距今1亿年前的最古老水生动物——一只身长仅5毫米的螃蟹。报道称,这是迄今最完整的螃蟹化石,将现代螃蟹历史向前推约2500万年。

Fossil stuck in 100 million-year-old amber is oldest "true crab" ever discovered

国际研究小组在一枚琥珀中发现距今1亿年前的最古老水生动物——一只身长仅5毫米的螃蟹。报道称,这是迄今最完整的螃蟹化石,将现代螃蟹历史向前推约2500万年。

In 2015, two researchers stumbled across a piece of amber jewelry in a market in Tengchong, China, that was found by miners in Myanmar. The piece has a young, five-millimeter-long crab embedded in it.

2015 年,两名研究人员在中国腾冲的一个市场偶然发现了一件琥珀首饰,这枚琥珀最先是缅甸矿工发现的。琥珀中嵌入了一只 5 毫米长的幼蟹。

That crab would be a major discovery in the study of crab evolution. A research team dedicated to the little crab released their findings Wednesday after years of studying the fossil. The newly discovered species is named Cretapsara athanata, "the immortal Cretaceous spirit of the clouds and waters," after spirits from South and Southeast Asian mythology.

这只螃蟹是该物种进化研究的重大发现。一个研究小组经过几年对这件螃蟹化石的研究,于周三公布了他们的最新研究成果。新发现的物种被命名为 Cretapsara athanata,以南亚和东南亚神话中的神灵命名,意为“白垩纪不朽的云水之灵”。

Before this discovery, scientists faced a conundrum: the known fossil record, consisting of just a few claws and carapaces, showed that crabs that lived on land and in fresh water split from their marine relatives between 50 to 75 million years ago. But the molecular record, which compares differences in DNA and RNA, said that the crab families split more than 125 million years ago.

在这一发现之前,科学家们面临着一个问题:已知的化石记录仅由爪子和碎片组成,表明生活在陆地和淡水中的螃蟹是在大约7500万到5000万年前从它们的海洋亲戚中分离出来。但是比较DNA和RNA差异的分子记录表明,螃蟹家族早在超过1.25亿年前就已经分离出来了。

That's why scientist Javier Luque, a Research Associate at Harvard University and co-author of the research team, was so surprised to discover the crab, that looks similar to other marine crabs, in amber, which is solidified tree sap.

这就是为什么哈佛大学的研究助理,也是该研究小组的合著者哈维尔·卢克 (Javier Luque)对这件螃蟹化石的发现如此惊讶的原因。他发现这种螃蟹看起来与其他海洋螃蟹相似,呈琥珀色,被凝固在树液中。

"In a way, it's like finding a shrimp in amber," said Luque in a press release。

“从某种程度上说,这就像在琥珀中找到一只虾,”卢克在一份新闻稿中说。

Using micro-CT scans, the team was able to capture tiny appendages like the crab's antennae, legs, the hairs on its mandible, compound eyes and even its gills that had all been perfectly preserved by the amber.

使用显微 CT 扫描,该团队能够捕捉到微小的附属物,如螃蟹的触角、腿、下颌毛、复眼,甚至是被琥珀完美保存的鳃。

The amber, dated to the dinosaur era, or 100 million years ago, bridges the gap between the two previously-known family splits and is, to this date, the oldest example of a "true crab" venturing onto land and the most complete fossil crab ever discovered, and indicates that crabs became terrestrial or amphibious around that time, much earlier than previously thought.

可追溯到1 亿年前的恐龙时代的琥珀弥合了先前已知的两个螃蟹家族分离时间上的鸿沟,并且是迄今为止最古老的“真正的螃蟹”冒险登陆陆地的例子,也是最完整的螃蟹化石,它的发现表明螃蟹在那个时候已经进化成陆生或两栖,比人们已知的要早得多。

China's largest online shopping spree gets greener******视频加载中,请稍候... play向前 向后

-- With the 13th China's Singles' Day approaching, the retail presales are looking impressive.

-- The annual event quickly grew into a major shopping spree.

-- The festival is no longer simply a consumption extravaganza but also a platform for promoting the concept of building a better life.

HANGZHOU, Nov. 9 (Xinhua) -- With the 13th China's Singles' Day approaching, the retail presales are looking impressive, as are the event's support for green consumption and the healthy development of e-commerce platforms.

The annual event, which falls on Thursday, was first started by Alibaba's e-commerce platform on Nov. 11, 2009, and quickly grew into a major shopping spree. However, it now carries additional connotations, thanks to enterprises' growing awareness of social responsibility and the country's detailed regulatory policies.

Also known as Double Eleven, the festival is no longer simply a consumption extravaganza but also a platform for promoting the concept of building a better life, according to Chris Tung, chief marketing officer at Alibaba Group.

A smart sorting system sorts packages at a distribution center of SF Express in Qingdao, east China's Shandong Province, Nov. 7, 2021. (Photo by Liang Xiaopeng/Xinhua)

"Here we want to convey ideas. What is deemed a good life, and what kind of actions are worthy of common aspirations. In addition to benefits, convenience and quality, we also hope to make long-term thinking that is more in line with the needs of social development and assume more corporate responsibilities," Tung said.

SHOPPING GREENER

This year marks the largest Singles' Day shopping festival on Tmall, with a record 290,000 brands participating and more than 14 million varieties of commodities offering discounts, according to the company. However, instead of simply luring consumers to sweep up the goods, the company has started encouraging them to shop "greener."

At 1:00 a.m. on Nov. 1, an hour into Tmall's first three-day discount period, over 25,000 water-saving flush toilets were swept away.

"If each toilet is used five times per day on average, then 225 tonnes of water can be saved in a day," said the company.

Tmall plans to issue 100 million yuan (about 17.2 million U.S. dollars) of green vouchers this year, encouraging consumers to buy energy-efficient home appliances and products with "green" certificates, as part of the efforts to support the country's carbon-reduction goals.

Besides, 60,000 courier stations under Alibaba's logistics arm Cainiao Network have prepared 7.5 million eggs as a reward for consumers recycling the parcel boxes.

Photo taken on May 28, 2019 shows a paper box that can be recycled for packaging displayed during the 2019 Global Smart Logistics Summit in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Huang Zongzhi)

"I have recycled 11 parcel boxes during this year's Singles' Day shopping spree, and the reward makes me feel encouraged and proud that I can make my own contribution to saving energy," said a resident in Hangzhou, capital of Zhejiang Province.

E-commerce giant JD.com has also joined the "low carbon" campaign, developing recyclable packaging, deploying new-energy cargo vans and adopting photovoltaic power generation in warehousing.

"E-commerce platforms have a natural advantage in promoting green consumption, and they can help establish a full green supply chain," said Jin Min, a professor with the Renmin University of China, adding that the Double Eleven shopping spree can help leverage the huge green consumer market.

SAFER ONLINE ECONOMY

The past 12 years have witnessed countless new online shopping records set during the Double Eleven. However, much attention has also been given to sellers infringing consumer rights, with consumers calling for stronger oversight of the industry.

On Nov. 6, the country's State Administration for Market Regulation released a guideline on regulating e-commerce platforms' marketing activities and cracking down on violations related to the Singles' Day shopping spree.

A saleswoman promotes socks via live streaming in Zhuji, east China's Zhejiang Province, Nov. 2, 2021. (Xinhua/Xu Yu)

Misconduct such as making false claims on discounts, exaggerating the efficacy of products, manipulating sales figures and comments, as well as selling counterfeit products, are all strictly forbidden, according to the guideline.

"The guideline will ensure e-commerce platforms and merchants are clear about the red lines, so that the consumer market can run smoothly," said Liu Fujun, general manager of a network technology company based in Beijing, which has been analyzing big data on Double Eleven.

In response, Chinese online retail platform Suning launched a "fixed price" sales promotion in southwest China's Chongqing Municipality. On Nov. 11, commodities at the designated outlet will be on sale, with no complicated rules such as presales or add-on items.

Aerial photo taken on Nov. 2, 2021 shows unmanned express delivery vehicles running on campus of the University of South China in Hengyang, central China's Hunan Province. (Photo by Cao Zhengping/Xinhua)

According to Hu Qimu, chief researcher at Tianyi Digital Economy Institute, stricter supervision will not dampen the vitality of the consumer market, but will contribute to the industry's healthy development, so that society can better enjoy the dividends it generates.

Official data shows that retail sales of consumer goods, a pivotal part of the internal economic circulation, went up 16.4 percent year on year in the first three quarters this year, with online retail sales surging 18.5 percent.

This year's Singles' Day shopping spree is expected to invigorate the consumer market and promote consumption upgrading, said Li Zhengbo, an expert with the China International Electronic Commerce Center, under the Ministry of Commerce.

 

成都山洪目击者:曾看到山顶的云异常 然后就听到"快跑"

1.刘亦菲“黑白造型”配卷发 气质优雅又温柔

2.耶路撒冷公交车遭枪击7人受伤 枪手向警方投案自首

3.美国以芯片法案遏华?想得“美”!

4.CNN:“芬瑞入约”是美国“外交努力”了六个月的结果

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