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Among them, Baoding city in Hebei, about 140 kilometers southwest of the capital, boasts the best achievement, with its average concentration of PM 2.5 during the period lowered to 53 micrograms per cubic meter, falling by 36.1 percent from the same period of 2018, according to the report.

Among the most popular? Microsoft and Google, with huge, packed booths. While both play in digital education content and tools, their ISTE announcements showed a slight difference in emphasis.

Amid the events, sporadic confrontations were also seen. The participants had to raise their voices and defend their position when masked and black-clad protesters showed up and attempted to interrupt. But no serious clashes happened.

Amazon’s Echo team?is?working on?a software development kit, setting the stage for outside developers to create third-party apps for the intelligent, talking home speaker.

American Upland cotton and American Pima cotton are two cotton species grown in the US. Upland cotton made up around 96.7 percent of all US cotton production in 2017, according to the USDA. Pima cotton is primarily grown in California and Arizona. Pima cotton is soft to the touch and durable.