学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.64
所属科目:小学英语
根据你在录音中听到的问题,将下面每组答句中最合适的答案选出,并将其字母符号填在句前的括号里。
(1)A. I like beef.        B. I’d like beef.     C. I don’t like beef.
(2)A. Yes, he is.         B. No, he is.          C. Yes, she is.
(3)A. Yes, they are .     B. No, there aren’t.   C. No, there are.
(4)A. Monday.            B. Math.               C. Miss Wu.
(5)A. She can sweep the floor.
B. He can sweep the floor.
C. She often sweeps the floor.
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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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