解析 A。本题考查现在完成时。“since the early 2000s”是现在完成时的标志,表示从过去某个时间点开始一直持续到现在的动作。A 选项“has changed”是现在完成时;B 选项“changed”是一般过去时;C 选项“was changing”是过去进行时;D 选项“changes”是一般现在时。
and technology is an integral part our daily lives. However, many of us still feel a strong sense of nostalgia when we think back to the old technology of the early 2000s.
MySpace, and eventually Facebook, which would go on to become one of the most popularwebsitesin the world. The proliferation of smartphones in the late 2000s and early 2010s led to another major shift in the way we use the internet. Mobile internet usage surpassed...
Its self-driving car project (2)___ from the Darpa Grand Challenges for robotic vehicles in the early 2000s. It has incorporated the latest technological (3)___ into its design at every phase ever since. A driverless car is a vehicle that is capable of sensing its environment and...
Later, in the early 2000s, the National Institute of Standards and Technology introduces a series of evaluations called theFace Recognition Vendor Test. These independent assessments of facial recognition databases are still in use today. 2010 ...
European countries adopted 2G before other regions, in the 1990s; Japan pioneered 3G in the early 2000s; and the US dominated the launch of 4G, in 2011. But this time China is leading in telecommunications rather than playing catch-up. In a TV interview, Jianzhou Wang, the former ...
A review of several aspects of inshore capelin biology and behaviour in the Northwest Atlantic during the 1980s and the early-1990s is presented. Since 199... BS Nakashima - 《Nafo Scientific Council Studies》 被引量: 17发表: 1994年 Sampling methodology and field work changes in the october ...
As Courtion shared, “There is an advantage of being an ‘older’ entrepreneur. I was there for the dot-com bust of early 2001 and saw what happened to Lehman Brothers during the 2008 crash. In order to survive, I knew that we needed to move early, fast, and make hard decisions.”...
Around the 1900s, the German physicist Paul Drude explained the optical behavior of free electrons in a solid based on the kinetic theory of free electrons in a metal. This theory is still widely used in literature today. In the early twentieth century, physicists Hagen and Rubens found that...
In the early 1980s, the research was started and in 1991 Radiolinja launched it officially in Finland under the standard Global System for Mobile Communication (GSM) (Mathematics, 2017). The 2G has taken the step afore by offering some special services like short messages, voice mails, ...