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
听短文,选择相应的图片,将其序号填入题前括号里。
(     ) 1. Tom ______ at ______ in the morning.
A. B. C.
(     ) 2. He ______ before school starts.
A. B. C.
(     ) 3. He has a(n) ______ lesson at ______ in the afternoon.
A.        B.        C.
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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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