学进去-教育应平等而普惠
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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。每小题读两遍。
(      ) 1. A. Yes, I am.                    B. Yes, he is.                                C. No, she isn’t.
(      ) 2. A. Yes, it is.                     B. It’s a panda.                         C. It’s climbing.
(      ) 3. A. It’s summer.                       B. It’s on July 1st.                    C. It’s John’s.
(      ) 4. A. I’m sleeping.             B. I often play the pipa.        C. At 7:30.        
(      ) 5. A. Because I can go swimming.   B. I like summer.        C. It’s summer.
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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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