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试题
类型:用单词的适当形式完成短文
难度系数:0.40
所属科目:高中英语
阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Having extended the record of Chinese astronauts'   1. (long)stay in space in a single flight mission to 90 days, the Shenzhou 12 mission crew   2. (return)to earth at the designated Dongfeng landing site in the Gobi desert on Friday,   3. (mark)a successful conclusion of the first crewed mission at the country's space station building stage.

The Shenzhou 12 return module separated from the orbiting module at 12:43 pm on Friday, then   4.(follow)by a smooth separation from the propellant, according to the China manned space agency. Carrying the three   5. (taikonaut)—mission commander Nie Haisheng and his fellow members, Liu Boming and Tang Hongbo, the return capsule touched down at the landing site at 1:34 pm. The homecoming heroes did not have to wait too long   6.   the search and rescue team reached them after their landing. They were confirmed   7.   good condition after they touched down   8. (safe)at the Dongfeng landing site.   9.   whole process was so smooth that Tang Hongbo was seen playing with the pen during the process of returning to earth. "Real gold   10. (fear)no fire", Nie Haisheng joked with his fellow crew as they entered the earth's atmosphere.

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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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