学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听对话 选出对话中所包含的正确信息。
(      ) 1. A. The Spring Festival is very important.        B. We wear new clothes.
C. The boy watches lion dance.
(      ) 2. A. The hamburger is 14 yuan.            B. They are happy.          C. They are at Dong dong’s home.
(      ) 3. A. Lingling wants the big raincoat.     B. The raincoat is yellow.          C. I want the small raincoat.
(      ) 4. A. I like playing chess.                      B. I like collecting stamps.        C. I like reading.
(      ) 5. A. They are at the cinema.                 B. The sign means “Do not spit.”
C. The sign means “Do not use a mobile phone”.
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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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