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,选择相应的答语,将其序号填入题前括号里。
(      ) 1. A. We're playing football.        B. He's playing football.             C. They're playing football.
(      ) 2. A. She's drawing pictures.        B. It's drawing pictures.             C. He's drawing pictures.
(      ) 3. A. Here is your eleven yuan.     B. I'm eleven.                           C. It's eleven yuan.
(      ) 4. A. Yes, please.                       B. Yes, it is.                              C. No, it isn't.
(      ) 5. A. I'm making cakes.               B. We want some tomatoes.        C. Me too.
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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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