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Amazon’s other Kindle e-readers include the basic 6-inch Kindle (.99), Paperwhite (9.99) and Voyage (9.99). Some of those models can be made waterproof with third-party covers or other add-ons, but the new version of the Oasis has that feature from the get-go.

Among all investment cases, 83 were in the e-commerce, 77 in internet finance, 48 in business services and 36 in online education.

Amazon’s rapid expansion in Seattle, and in the world of tablets, was one of the biggest stories of the year.

Amid rising concerns about companies' stock-based collateral - by which shares are pledged as collateral for loans - some local authorities have taken steps to stabilize market sentiment, granting preferential policies to ease financing conditions and allowing financial institutions to renegotiate lending terms.

Amazon’s latest misstep is the abrupt, and still unexplained, shuttering of TenMarks, a math and writing software startup it purchased in 2013 and announced in 2018 it would close the following year, leading to a lot of frustrated, Twittering teachers. That was preceded by the forever-in-beta Amazon Inspire, an educational resource sharing site launched in 2016 but kicked hard in the knees immediately afterward, when a handful of copyrighted items were found posted on it. A year later, the company also lost its K-12 education general manager, who had come to Amazon with the TenMarks acquisition.