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,选择正确答语。
(     ) 1. A. Yes, she did.       B. Yes, she does.             C. Yes, she is.
(     ) 2. A. I’m 12 years old.       B. I’m 1. 62 metres.             C. I’m 52 kilograms.
(     ) 3. A. He went to Hubei.       B. He went there by train.       C. He went fishing with his father.
(     ) 4. A. Yes, it was.             B. There was no gym.             C. It was good.
(     ) 5. A. I’m going to go camping.       B. I cleaned my room yesterday.   C. I wash my clothes every day.
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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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