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,根据所听句子,选择正确的答句。(听两遍)
_____) 1. A. They eat jiaozi.         B. They give their mothers presents.     C. They look at the moon.
_____) 2. A. I am in Nanjing.         B. She flies kites.             C. I climb mountains.
_____) 3. A. It is on the second Sunday of May.     B. It is on the second Sunday of June.
C. It is on the third Sunday of June.
_____) 4. A. They look at the moon and eat moon cakes.
B. I visit my friends.     C. She eats rice cakes.
_____) 5. A. No, I'm not.         B. Yes, I do.     C. It's on the thirty-first of October.
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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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