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
听录音,为你所听到的句子选择正确的答语。
_____) 1. A. I'm nine.    B. It's nine o'clock.    C. It's a clock.
_____) 2. A. I'm fine.    B. I' m Chinese.    C. I'm in Beijing.
_____) 3. A. Yes, I do.    B. Yes, I am.    C. Yes, it is.
_____) 4. A. Thanks.    B. OK! Let's go!    C. Be quiet!
_____) 5. A. It's time for bed.    B. It's time for lunch.    C. It's time to get up.
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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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