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难度系数:0.65
所属科目:初中英语
More Astronauts At Tiangong
China’s space station is now a lively place—three astronauts in the Shenzhou XV mission arrived on November 30. Let’s learn more about the mission.
About launching (发射)
When: 11:08 pm on Nov.29                Where: Jiuquan Satellite Launch Center in Gansu

Meet the crew (全体机组人员)
Major General: Fei Junlong
Senior Colonel: Deng Qingming
Senior Colonel: Zhang Lu
With the crew’s average (平均的) age being 53, they are experienced astronauts. Both Fei and Deng were selected in January 1998 as two of China’s first astronauts.
Highlights of the mission
1) The Shenzhou XV crew will stay inside the Tiangong space station for six months
2) Their arrival at Tiangong marked the first time that as many as six Chinese astronauts are traveling in space at the same time.
Main tasks (任务)
During their stay, the Shenzhou XV crew’s tasks include:
1) Three to four spacewalks to set up equipment (设备) outside the station
2) Testing 15 scientific cabinets (柜)
3) Doing more than 40 scientific experiments
1.There were _________ astronauts at Tiangong on Nov.30.
A.3B.4C.5D.6
2.According to the passage, which statement is true?
A.Shenzhou XV launched on Nov. 30.
B.Zhang Lu wasn’t China’s first astronaut.
C.The crew will take three to four spacewalks inside the station.
D.They will just do 40 scientific experiments.
3.How long will Shenzhou XV crew stay at Tiangong space station?
A.One year.B.Two years.
C.Three years.D.Half a year.
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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

用户名称
2019-09-19

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

用户名称
2019-09-19
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