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
Listen and choose. 听问句,选答语,每题读两遍。
(      ) 1. A. Yes, he can.                       B. He can buy a postcard.                 C. Yes, he is.
(      ) 2. A. Yes, I do.                           B. Because they’re interesting.          C. I have two.
(      ) 3. A. I often wash my clothes.       B. I’m going to wash my clothes.       C. I like washing my clothes.
(      ) 4. A. I’m going to the park.          B. I’m playing football.                    C. I’m going next week.
(      ) 5. A. She’s going by plane.          B. We’re going this Sunday.               C. Next Sunday.
(      ) 6. A. No, I do.                           B. Yes, I do.                                     C. I have a postcard.
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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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