语音朗读：
重点推荐:庆祝教师节作文400字
2023年起，滴滴组建了多支上百人的保障车队，为多种大型活动提供专属出行服务保障。今年前7个月，安徽自贸试验区实际使用外资同比增长倍。公司已事先向深圳证券交易所提交了变更公司名称及证券简称事项的书面申请，深圳证券交易所对公司本次变更名称及证券简称事项无异议。
如有符合活动条件的商家出现无法核销的问题，请致电中国银联客服：95516。他希望大家好好享受自己的生活，量力而为，“不要让喜欢孙阳这件事情变成负担”。
今年上半年，该公司所在的薛城区累计实施工业技改项目57个，项目计划总投资亿元(人民币，下同)，完成投资亿元，实现增幅%。改善需求及刚性需求将在9-10月逐渐释放，给市场带来活力。
一是管理体系建设实现新突破。欢迎大家来新疆喀什品尝！”7日，面对直播镜头，在新疆麦盖提县巴扎结米镇亚胡木丹村从事水产养殖的吴治军为自家龙虾带起了货。
Over 350 companies are presenting their cutting-edge helicopters and drones at the sixth China Helicopter Exposition in north China's Tianjin Municipality, of which more than 40 are making their debut.
A total of 65 helicopters and drones were demonstrated across an exhibition area spanning 160,000 square meters.
Fenglei, the aerobatic team from the Chinese People's Liberation Army (PLA) Ground Force, showcased novel and stunning aerobatic stunts with its seven Z-10 helicopters, six Z-19 helicopters and two Z-20 helicopters at the opening of the expo.
Z-10 is China's first homegrown, dedicated armed helicopter. It has the capability to carry air-to-air missiles, air-to-ground missiles, rockets and cannons, featuring a combat advantage with low-altitude, high-speed penetration for ground and air attacks.
With the introduction of Z-19 after the deployment of Z-10, the PLA aviation corps has seen an unprecedented improvement, enhancing its overall combat capability.
Z-20, the fourth-generation general helicopter independently developed by China, fills the gap of PLA's 10-tonne medium-sized general helicopter models and marks breakthroughs in several key technologies in the country.
A hydrogen-powered drone, featuring long endurance, low noise and maneuverability, has captivated visitors at the expo.
According to Wang Fei, a senior engineer with the China Helicopter Research and Development Institute under the Aviation Industry Corporation of China, Ltd. (AVIC), one prominent advantage of the configuration of the hydrogen-powered vehicle is that it offers longer endurance with the ability to reach up to three hours, whereas vehicles with other types of energy sources endure around one hour.
"This enables it to perform tasks for a longer duration and cover a wider range," said Wang.
By carrying different types of units, it can be used for various tasks, such as communications relay and 3D mapping.
In addition, an electric-driven hexarotor aerial vehicle, the AR300 aircraft, which is equipped with a full composite material airframe structure and designed based on a modular concept, has been shown for the first time.
Not constrained by ground traffic or the need for a helipad, the vertical takeoff and landing aerial vehicle is capable of swiftly transitioning between manned and unmanned modes.
"Its distinctive feature is a replaceable unit hanging underneath, which allows for manned operation when connected to a passenger cabin or facilitates logistics transport when equipped with a cargo module," said Wang.
Held from Thursday to Sunday, the exposition has become the only national-level international helicopter exposition and the only one with professional airshows.
