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
听句子三次,选出相应的答语,把答案的字母编号写在括号内。
(      ) 1. A. It’s small.                         B. It’s on the desk.
(      ) 2. A. It’s Jiamin’s.                      B. It’s cute.
(      ) 3. A. They are blue.                    B. They are Ben’s pets.
(      ) 4. A. It’s Janet.                           B. It’s beside the pencil-case.
(      ) 5. A. It’s yellow.                           B. It’s on the desk.
(      ) 6. A. It’s my brother.                    B. Yes, it is.
(      ) 7. A. Yes, here you are.                 B. They are my cousin’s.
(      ) 8. A. Yes. It’s 654321.                  B. Yes, I do.
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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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