微电子技术的应用及发展趋势

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US Secretary of State Rex Tillerson claimed that in Latin America, China "offers the appearance of an attractive path to development" that "often involves trading short-term gains for long-term dependency".

US air travel is down about 95 percent from a year ago. Calhoun warned it could take two or three years for demand to return to 2019 levels, an assessment supported by earnings of two major companies.

US chip giant Qualcomm will present its frontier technologies in 5G, artificial intelligence and internet of things at the expo. Zhao Bin, senior vice-president of Qualcomm, said the company is dedicated to tapping the Chinese market and values the opportunity to participate in the expo.

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US President Donald Trump takes questions from the media after speaking via teleconference with troops from Mar-a-Lago estate in Palm Beach, Florida, US, November 22, 2018. [Photo/Agencies]

US President Donald Trump and the Democratic People's Republic of Korea leader Kim Jong-un praised their historic summit on Tuesday in Singapore, which is aimed at achieving peace and denuclearization on the Korean Peninsula.

US President Donald Trump emerges from Air Force One as he returns to Washington at Joint Base Andrews, Maryland, May 17, 2019. [Photo/Agencies]

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US Special Representative for Afghan Reconciliation Zalmay Khalilzad said at an event in Washington on Feb 8 that he expected a final deal could be reached before Afghanistan's presidential election in July.

US President Donald Trump speaks to the media in Palm Beach, Florida, US, Dec 24, 2019. [Photo/Agencies]

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US President Donald J. Trump speaks as he signs an executive order for additional sanctions against Iran and its leadership, after signing it in the Oval Office at the White House in Washington, DC, the United States, on June 24, 2019. [Photo/IC]

US Vice-President Mike Pence (L) and Japan's Prime Minister Shinzo Abe shake hands during their meeting at Abe's official residence in Tokyo, Japan, on Feb 7, 2018. [Photo/VCG]