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
听录音2遍,选出你所听到句子的正确答语。
(      ) 1. A. They are cows.                 B. Yes, they are.                   C. They are yellow.          
(      ) 2. A. White.                           B. Five yuan.                      C. Twenty boys.               
(      ) 3. A. Yes, they are.                   B. No, it isn’t.                      C. No, they are long.                  
(      ) 4. A. I like vegetables.              B. It’s warm today.              C. I like horses.            
(      ) 5. A. Yes, you can.                   B. No, you aren’t.                 C. Yes, I can.
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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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