学进去-教育应平等而普惠
试题
类型:完形填空
难度系数:0.65
所属科目:小学英语

   One day there was a very big earthquake like this. The roads _________. A lot of houses and big buildings fell down. People were very _________. They had to go away from their houses. Some had to live in _________. People had to come with food and water for them. But some people were under the _________ and they did not get away. Rescue workers _________ people out of the rubble.

1.
A.crackedB.fellC.wide
2.
A.angryB.worriedC.frightened
3.
A.houseB.tentsC.buildings
4.
A.tentsB.buildingC.rubble
5.
A.helpedB.pulledC.asked
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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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