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:0.85
所属科目:小学英语
听录音,选出正确的答语。每个句子读两遍。
(     ) 1. A. On foot.     B. Near the park.     C. My sister.
(     ) 2. A. By bus.     B. No. 12 bus.     C. Half an hour.
(     ) 3. A. She is a teacher.     B. She works at a school.     C. She goes to work by bike.
(     ) 4. A. Yes, she can.     B. Yes, he does.   C. Yes, she does.
(     ) 5.A.I live near school.     B. She lives on Green Street.     C. She likes walking.
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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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