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
听录音,选择正确答案。
(      ) 1. Today is ______.
A. Monday                       B. Saturday                 C. Sunday
(      ) 2. My mother is going to ______.
A. do the homework          B. the supermarket       C. do the housework
(      ) 3. My father is going to ______.
A. visit his teacher             B visit his friend          C. visit his parents
(      ) 4. I’m going to buy ______.
A. an interesting book          B.   a dictionary             C. a comic book
(      ) 5. ______ are going to have a big dinner in the evening.
A. My parents            B. My parents and I     C. My parents, my grandparents and I
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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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