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
Listen and choose. 听短文,选择正确的答句。
_____) 1. A. I lost my bag.         B. He lost his bag.         C. They lost their bags.
_____) 2. A. Don't worry. I’ll help you. B. You’re really lucky.     C. Don't!
_____) 3. A. I got an apple.         B. I gave an apple.        C. She got an apple.
_____) 4. A. He pushed the door.    B. He has to push the door.  C. He didn’t push the door.
_____) 5. A. You have to pull!       B. You have to throw it.    C. You have to find them
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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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