A reentry capsule（太空艙）carrying the crew —— Chen Dong，Liu Yang and Cai Xuzhe —— touched down on Earth at the Dongfeng Landing Site in northwestern China's Gobi Desert after flying nine hours.This has become the first time that Chinese astronauts have returned to Earth at night，which meant low temperatures and low visibility.Many technologies were developed to make sure the Shenzhou - 14 crewed spaceship went back safely.
The temperatures can be tricky.From the moment the spaceship separated from the space station on the way home，it has to start its own thermal （熱 的） control system to keep the temperature between 17 and 25 degrees，an ideal condition for the astronauts.When the spaceship enters Earth' atmosphere，it can cause temperatures of over 1，000 degree Celsius，so the ship has a heat shield on its bottom to protect itself from the high temperature.
High efficient communication is another promise of the safe return.The ground teams including control center in Beijing，landing site and rescue teams use the BeiDou Navigation Satellite System.The rescue helicopters also have a smart system to help predict the path of the reentry capsule during landing.
When the spaceship is 10 kilometers above the ground，the three parachutes （降落傘） will open one after anojye.air.The size of the parachutes will expand from only several square meters to over 1，000 square meters，gradually reducing the spaceship speed from 200 meters per second to seven meters per second，which protects astronauts from gravity force overload. "It's like when we're driving，we need to slow down gradually， "said Rong Wei，chief designer of manned spaceship at the 5th Academy of Aerospace Science and Technology Group，At the same time，the engine will be ready for a soft landing.
（1）Why was Shenzhou- 14 spaceship's returning different than before？ DD
A．Because the landing site is in the Desert.
B．Because there are less astronauts in Shenzhou- 14.
C．Because the returning time was put off.
D．Because it was cold and dark outside.
（2）What do we know about the temperature change in the capsule？ AA
A．It was controlled to fit astronauts' condition.
B．It was the highest at the very beginning.
C．It went to the frozen point in the atmosphere.
D．It kept dropping before starting the control system.
（3）What is the purpose of using the BeiDou Navigation Satellite System？ BB
A．To design the best landing spot.
B．To assure the location of the capsule.
C．To control the temperature in capsule.
D．To send orders from the capsule.
（4）What is the main idea of the last paragraph？ CC
A．How the engine expanded parachutes.
B．How the gravity force influenced landing.
C．How the landing parachutes worked.
D．How astronauts controlled the landing.
【考點(diǎn)】新聞報(bào)道．
【答案】D；A；B；C
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：3引用：3難度：0.5
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