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Boeing hopes the software upgrade and associated pilot training will add layers of protection to prevent erroneous data from triggering a system called MCAS, which was activated in both the planes before they crashed.
Bolsonaro tested negative in an initial examination last week after his communications secretary Fabio Wajngarten, who was part of a presidential party that visited Florida and met with US President Donald Trump last week, tested positive.
Boeing also forecasts that China's market will generate demands on commercial aviation services valued at 1.7 trillion U.S. dollars and 750 new and converted freighters over the next 20 years.
Boasting a pristine ecology and one of the world's largest black soil zones, Heilongjiang is the most important grain production province in China.
Both of them worked at an expansion project of the No 333 provincial road in Gaoyou, in different sections. Thanks to Guo's carefulness, Xu gradually adapted to the life at the construction site.
来源：资阳报