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:0.85
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. I have a headache.         B. He has a fever.         C. She has a bad cold.
_____) 2. A. You should have a rest.     B. Yes, I do.         C. He should take some medicine.
_____) ) 3. A. I can't hear well.         B. No, I can.         C. Sure. Let me check.
_____) 4. A. Yes, I do.             B. Yes. I have a fever.     C. I have a headache.
_____) 5. A. You should have a rest.     B. He should have a rest.     C. I should have a rest.
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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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