学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
听录音,选择正确答案。每小题读两遍。
_____) 1. A. It’s on your head.     B. It’s a bag.           C. It is in your bag.
_____) 2. A. Because I’m happy.   B. Because I’m sad.     C. Because I’m angry.
_____) 3. A. This is my bag.       B. Your bag is there.    C. There are some baseball caps.
_____) 4. A. Yes, they did.         B. No, they don’t.       C. Yes, they do.
_____) 5. A. In the classroom.     B. On the playground.   C. They like to play baseball.
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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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