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
听问题,选答句, 写字母编号。(共 5小题,每小题2分)
(1)A.Yes, I do.
B.Yes, he does.
C.Yes, she does.
(2)A.It’s warm.
B.It’s cold.
C.It’s cool.
(3)A.No, it isn’t.
B.No, I’m not.
C.No, I don’t.
(4)A.They are 45 yuan.
B.It’s 45 yuan.
C.It’s cheap.
(5)A.I like diving.
B.He likes swimming.
C.She likes running.
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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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