学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.94
所属科目:小学英语
听音选句。把正确的选项填在前面的括号内。
(1)A. Daming painted some food.    
B. Daming printed some newspapers
(2)A. He saw lots of mountains.     
B. He saw a lot of plants       
(3)A.Chinese people invented printing
B.Chinese people invented paper.
(4)A. She didn’t hurt a lot.          
B. She didn’t practice a lot.  
(5)A. It didn’t become a snake.       
B. They didn’t come last Wednesday.
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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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