学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
听录音,选择你所听到的内容。
(     ) 1. A. Good morning.          B. Good afternoon.        C. Good-bye.
(     ) 2. A. I’m a monkey.            B. I’m a mouse.             C. I’m a tiger.
(     ) 3. A. They are green birds.
B. They are birds’ eggs.
C. They are beautiful.
(     ) 4. A. I like milk.               B. I love bread.                 C.I don’t like rice.
(     ) 5. A. Turn left.                 B. Turn right.                 C. This is left.
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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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