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
听录音,根据所听句子,选择正确的答句。(听两遍)
(      ) 1. A. She's Yang Ling.             B. Here you are.                  C. This is Yang Ling speaking.
(      ) 2. A. No, you don't.                 B. I have a fever.                 C. Yes, I do.
(      ) 3. A. Not so good.                  B. Here you are.                  C. Well done.
(      ) 4. A. I have a doll.                  B. I have a kite.                  C. I have a cough.
(      ) 5. A. Good idea.                    B. Nice to see you too.          C. See you.
(      ) 6. A. I'm sorry to hear that.     B. You can come to school tomorrow.     C. Let's go and play football.
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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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