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
读句子,选择正确的图片。






(    )1. -What do you do?
-I am a policeman.
(    )2. -What does he do?
-He is a vet.
(    )3. -What does he do?
-He is a doctor.
(    )4. -What do they do?
-They are students.
(    )5. -Is he a pilot?
-Yes, he is.
(    )6. -Are you a dancer?
-Yes, I am.
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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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