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
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(      ) 1. A. It’s on June 1st.             B. It’s on March 12th              C. It’s on October 1st.
(      ) 2. A.Swimming.                    B. Summer.                              C. Sleeping.
(      ) 3. A. They’re mine.                 B. It’s Chen Jie’s.                       C. It’s hers.
(      ) 4. A. He’s cooking                 B. They’re running.                     C. It’s climbing.
(      ) 5. A. Yes, I am.                      B. Yes, she does.                    C. Yes, she is.
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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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