学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听问句,选择正确的答语,将答案代号填在对应位置里。
(     ) 1. A. I feel so warm.               B. It’s cold and rainy.        C. The water is warm.
(     ) 2. A. It’s my brother.               B. It’s a jacket.        C. It’s my brother’s.
(     ) 3. A. Twenty.               B. I’m twelve.        C. I like cows.
(     ) 4. A. It’s fifty yuan.               B. They are fifty yuan.        C. They are yellow.
(     ) 5. A. It’s on the first floor.        B. Yes, it is.        C. It’s our music room.
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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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