人民网北京9月14日电 （记者赵竹青）9月13日21时18分，中国文昌航天发射场，长征七号改运载火箭（简称“长七A火箭”）点火升空，成功将中星1E卫星送入预定轨道。    MOGADISHU, Somalia -- An explosives-laden car detonated at a military facility on the outskirts of Somalia's capital Saturday and killed at least six people, four of them soldiers, police said.Police spokesman Sadik Dodishe said nine others, including five soldiers, were wounded in the suicide bombing at the military facility in the Elasha Biyaha area of the Lower Shabelle region.The Islamic extremist group al-Shabab claimed responsibility. The group frequently carries out such attacks. Photos shared on the social media platform X showed the extent of the damage caused by the explosion, which destroyed the security base and several civilian houses in the vicinity.”The sound of the explosion was deafening ... and I saw a plume of smoke going up in the sky," witness Ayan Hussein, a resident of Elasha Biyaha, said by phone. She said she saw several injured people being carried into an ambulance.Somalia's federal government has battled al-Shabab for years. Security forces stepped up their assault on the group in recent months, including trying to dismantle its propaganda network. Information Minister Daud Aweis told reporters that authorities had shut down four radio stations affiliated with the group and killed nearly 3,800 al-Shabab fighters during a military offensive in which federal forces reclaimed 1,000 kilometers (621 miles) of territory.___Follow AP's coverage of Africa at https://apnews.com/hub/africa。该卫星可为用户提供高质量通信广播电视服务。该火箭由中国航天科技集团有限公司所属中国运载火箭技术研究院（以下简称“火箭院”）抓总研制。

B | 据了解，长七A火箭是我国新一代中型运载火箭的主力构型，是在长征七号运载火箭和长征三号甲系列运载火箭三子级基础上、通过组合化设计形成的高轨三级液体捆绑式运载火箭，地球同步转移轨道运载能力不低于7吨，填补了我国运载火箭地球同步转移轨道5.5至7吨运载能力的空白，可适配直径4.2米和3.7米两种整流罩，具备一箭一星和一箭双主星发射能力。长七A火箭主任设计师魏远明介绍，本次执行任务的长七A遥五火箭，采用整流罩直径4.2米的构型，全箭高度60.1米，与2021年3月12日发射的遥二火箭高度一致。长七A火箭作为我国首型采用助推器与芯一级集束式分离技术的捆绑火箭，相比通常先分离助推器、再分离芯一级的方式，减少了一次分离环节，使火箭捆绑连杆结构更加简化。同时，集束式分离也减少了一个助推器落区，整个组合体都在一个落区内，更加有利于控制火箭残骸落区。此次是长七A火箭第四次执行发射任务，火箭状态正在逐步固化，同时为进入高密度发射阶段提前准备。魏远明介绍，型号队伍针对火箭技术设计进行了多项优化改进，在确保测试覆盖性的前提下，通过优化流程顺序、并行工作、合并测试等方法，将发射技术流程由32天缩减至26天。不仅如此，根据高轨卫星整体发展态势，以及高轨卫星配置大尺寸天线的迫切需求，长七A火箭未来还将研制5.2米整流罩的新构型，进一步提高火箭的任务适应性。(责编：赵竹青、高雷)