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
听问句选答语。根据听到的问句选择恰当的答语。
(      ) 1. A. It’s a duck.               B. It’s five o’clock.     C. Of course.
(      ) 2. A. Yes, they are.        B. Yes, it is.                     C. No, they are.
(      ) 3. A. I’m going to do my homework.
            B. I do my homework.
            C. I did my homework.
(      ) 4. A. It’s half past ten.               B. Yes, it is.               C. It will be sunny.
(      ) 5. A. Yes, it won’t.                     B. No, it won’t.        C. No, it willn’t.
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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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