Q: I think we may have goofed. We bought a tablet that claims to be Wi-Fi only. Can it be activated to handle 4G cellular data?问：我实在我们有可能任性了。

记者从中科院合肥物质科学研究院得知，该院安徽光机所激光技术中心方晓东研究员课题组，在利用准分子激光技术提高钙钛矿太阳电池全称性能研究方面获得新进展。

据Redmi红米手机官微消息，Redmi K30 5G手机将在1月7日上午10点，仅有渠道现货首买，该机全球亮相骁龙765G、索尼6400万前后六摄、120Hz流速屏。

Volvo is aiming to put up to 100 self-driving cars on the roads in China in the hope that testing them on the country’s notoriously congested, hazardous roads w...