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
听五组小对话,根据所听对话内容选择正确的答案。每组对话听两遍。
(      ) 1. There are(有) ________ books are on the desk.
A. 7       B. 8       C. 9
(      ) 2. That is a ________.
A. classroom       B. school       C. park
(      ) 3. Sam’s bag is ________.
A. blue       B. red       C. yellow
(      ) 4. This is Daming’s ________.
A. grandma       B. grandpa       C. mother
(      ) 5. Tim is ________.
A. 8       B. 11       C. 12
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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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