学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听问句,选答语。
______) 1. A. I'm telling a story.   B. They are playing badminton.     C. He' s looking at the moon.
______) 2. A. I like singing.       B. I want a toy train.     C. I have a headache.
______) 3. A. They're eighty-five yuan.   B. It's fifty-six yuan.     C. We have three.
______) 4. A. This is my cousin.     B. This is Miss Liu speaking.     C. My name is Kate.
______) 5. A. No, they aren't. They' re doing the long jump.       B. Yes. we are.
C. Yes, they are. They're all good runners!
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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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