分段函数

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The program will make plans for about 8,000 hectares of arable land in central China's Hunan province and develop a monitoring database and risk management tool.

The projects are among the 50 medical and health aid programs that China has decided to upgrade for Africa under the country's eight major initiatives in close collaboration with African countries proposed by President Xi Jinping in 2018.

The projection worsened from the previous estimate announced by the HKSAR government at the end of April that the economy would contract by 4 percent to 7 percent this year.

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The primary responsibility of implementing the law within the city's boundaries remains with the local authorities. The central government retains jurisdiction over national security matters in some specified circumstances.

The price of the artificial skin is around 120 yuan per square centimeter, much lower than foreign products that are priced at around 700 yuan per square centimeter. She added that the artificial skin product is expected to generate a sales volume of 40 million yuan this year and revenue of 300 million yuan in the next three years.

The program also includes agroindustrial farms Aldeia Nova and Biocom, textile companies Textang II, Satec and Africa Textil, cement plants Nova Cimangola and Secil do Lobito, breweries such as Cuca, Eka and Ngola, and the engineering and construction company Mota-Engil Angola, he added.

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The project is set to provide short route self-driving vehicle services for persons with disabilities and senior citizen communities, said the company at the Consumer Electronics Show 2018 in Las Vegas.

The program plays a vital exemplary role for other Qinghai cities and counties to solve the problem of poverty-returning, he said. "It will help Qinghai step into an all-around well-off society by 2020.”

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The prevalence of myopia among teenagers in China is the highest in the world, and more than 70 percent of middle schoolers and college students have it, according to a recent World Health Organization report.

The project can also help save 49 million tons of standard coal and 12.8 million tons of carbon dioxide emissions.