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An onboard pointer or other hardware could indicate that an obstacle has to be moved, or that a dog has to be put inside, in order for the delivery to be made.

And in a sign of significant change, this year, for the first time, a majority of US consumers — 54 percent — say they will do the bulk of their holiday shopping online, according to PricewaterhouseCoopers.

Analysts believe the international oil market will remain vulnerable to multiple factors. For example, Organization of the Petroleum Exporting Countries (OPEC) and non-OPEC producers have agreed on an extra cut of 500,000 barrels in daily output in the first quarter of 2020.

Analysts have consistently said the aircraft's technical problems can be fixed, but a basic unanswered question remains: Will passengers trust Boeing and board the 737 MAX when it returns to service?

Analysts said the faster growth was driven by industrial reconstruction, the upgrade of power usage structure and the switch from coal to electricity for winter heating.