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On April 16, Shenzhou XIII astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu safely came back to Earth from the Tiangong space station.
Speedy return
The mission set a new speed record. When the Shenzhou XII came back from the space station in 2021, it took about 28 hours. This time, Shenzhou XIII cut down the number of orbits (环绕地球圈数) from 11 to five.
Landing upright
The re-entry capsule (返回舱) landed upright (直立). This landing position is rare in China’s space flight history.
Keeping seated
| A．It took just 9 hours to return! |
| B．The astronauts felt good after landing. |
| C．There are many interesting facts about their landing. |
| D．Only Shenzhou VI and Shenzhou XIII have successfully done so. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
