China welcomed three heroic astronauts home on April 16.The re-entry module（返回艙）carrying astronauts touched down safely at the Dongfeng Landing Site in Inner Mongolia autonomous region.This ended the Shenzhou XⅡ astronauts' six-month space mission.This return marks a major breakthrough for China's efforts in space. （1）BB
Speed record
The mission set a new speed record.The Shenzhou XⅡreturn capsule revolved around the Earth 11 times over 24 hours. （2）FF The Shenzhou XⅢ mission was simplified to only five orbits and was designed to return more efficiently，according to the Chinese Academy of Space Technology.
（3）DD It also needed more accurate orbital calculations.This meant that when the spacecraft separated，it could quickly target the landing area，calculate the return path，and adjust its altitude，Wang Ya'nan，editor-in-chief of Beijing-based Aerospace Knowledge magazine，told the Global Times.
Temperature control
Another challenge for astronauts returning to Earth is traveling through the atmosphere.After the re-entry capsule enters the atmosphere，there is fierce friction（摩擦）with the air. （4）EE To solve this problem，the researchers designed a heat-resistant coating on the surface of the Shenzhou XIII return capsule.They also laid a layer of a special material that takes away the heat.
Landing
The re-entry capsule landed upright in the right area.Such a landing position is rare in China's space flight history. （5）GG To achieve this，astronauts must operate and let go of parachute（降落傘）with accurate timing.Landing upright is the ideal way to land，ensuring astronauts have the softest landing，Pang Zhihao，a spaceflight researcher in Beijing，told Science and Technology Daily.
A.We have made great efforts to land successfully for years.
B.Let's look at some of the technical details of the mission，
C.Some strategies may help you better understand the mission.
D.This approach required more precise control of the spacecraft.
E.The surface temperature of the capsule can reach thousands of degrees.
F.Shenzhou XⅢshortened the time to about 9 hours，orbiting Earth five times.
G.So far，only Shenzhou VI and Shenzhou XⅢ have achieved an upright landing.
【考點】傳統(tǒng)習俗與文化；生命的意義與價值．
【答案】B；F；D；E；G
【解答】
【點評】
聲明：本試題解析著作權屬菁優(yōu)網所有，未經書面同意，不得復制發(fā)布。
發(fā)布：2024/4/20 14:35:0組卷：5引用：4難度：0.5
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▲（2）
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