学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.64
所属科目:小学英语
阅读对话。
A.B.C.D.
(1)— Mom, come quickly. There is a bird in my bedroom! — A bird? Where is it?
— It's under my bed! It can't fly! ________
(2)— Ok, I'm coming! Is it still under the bed?
— No, it is on the chair now. ________
(3)— Where is it? Let's catch and help it!
— It's behind the radio. ________
(4)— But it isn't here.
— Oh, mom. Look, it is in the box now. I can catch it. ________
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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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