Astronaut propulsion unit Astronaut propulsion unit An astronaut propulsion unit (or astronaut maneuvering unit) is used to move an astronaut relative to the spaceship during a spacewalk. The first astronaut propulsion unit was the Hand-Held Maneuvering Unit (HHMU) used on Gemini 4. The Hand-Held Maneuvering Unit was the EVA "zip" gun used by Ed White on the Gemini 4 mission in 1965. The hand-held gun held several pounds of nitrogen, and allowed limited movement around the Gemini spacecraft. It was also used by astronaut Michael Collins on the Gemini 10 mission in 1966. The United States Air Force (USAF) Astronaut Maneuvering Unit (AMU)
Chinese as a foreign language using intonation whilst retaining the correct tones. Chinese courses have been blooming internationally since 2000 at every level of education. Still, in most of the Western universities, the study of the Chinese language is only a part of Chinese Studies or sinology, instead of an independent discipline. The teaching of Chinese as a foreign language is known as "duiwai hanyu jiaoxue" (). The Confucius Institute, supervised by Hanban (the National Office For Teaching Chinese as a Foreign Language), promotes the Chinese language in the West and other parts of the world. The People's Republic of China began to accept foreign