【摘 要】
：
Nowadays, smartphone app HealthKit has become a must-have “passport”for people to go anywhere inChina due to the novel coronavirus disease(COVID-19). However,
论文部分内容阅读
Nowadays, smartphone app HealthKit has become a must-have “passport”for people to go anywhere inChina due to the novel coronavirus disease(COVID-19). However, though the app ishandy for identifying those at risk of beinginfected through a color-coded system, ithas left some people, mostly senior citizenswho are relatively new to smartphones, inan awkward situation.
其他文献
Recently, placards with slogans of stop wasting food and Clear Your Plates have been pop-ping up on tables in restaurants across the country, where waiters are
现如今,随着市场经济的不断完善,新电改政策开始普遍实施,电力市场售电侧竞争格局受到很大的影响,有关调查结果显示,新电改政策的实施会大大提高电力市场的竞争力,电力市场售
现代科学技术的发展都是人们合作探索的结果，社会的人文精神弘扬也把乐于合作、善于合作作为重要的基石。合作的意识与能力是现代人所应具备的基本素质，但是在以往的课堂教学中
Although its autumn, the trees in theYuquan Mountain Forest Park in Taiyuan,Shanxi Province in north China, are stillgreen and the park is full of people taking
Different from the common practice inWestern economies where governmentsadopt a short-term vision andprediction of future events, China relieson a tradition tha
硼化物材料以及钛化物材料以其优异的性能在当代得到了广泛的应用,本文综述了CaB_6、硼化钨、Ti Al和TiC粉体的性能、应用以及制备方法。通过在Ca O-B_2O_3-Mg、W-B_2O_3-Mg、Ti-Al和Ti-C四个反应体系中加入NaCl,研究了盐助燃烧合成法中熔盐NaCl的作用,并探究了NaCl在四个反应体系中的作用机理以及对产物粉体的形成机理,找出了NaCl对产物的微观形貌、物相和粒度
The Chinese economy, which plays a keyrole in driving global economic growthin the era of globalization, has seensteady progress during the 13th Five-Year Plan(
低温燃料电池包括碱性燃料电池和质子交换膜燃料电池，具有快速启动、比能量高和低温环境等特点，但需要贵金属铂作为催化剂。金属硒化物具有良好的电催化活性和化学稳定性，且成本
The Ministry of Commerce has recentlyannounced Chinas own digital currency,the digital RMB, will be piloted in Beijing,Tianjin, the Yangtze River Delta, and som
Since the British voted to leave theEU in the summer of 2016, it wasclear that something that seemed tobe simple in theory was to be difficult inpractice.rnAfte