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,选出句子或对话所缺的内容。(听两遍)
(      ) 1. This is ______.
A. my father             B. my uncle             C. me
(      ) 2. Who's that ______?
A. woman             B. girl               C. baby
(      ) 3. Look at ______.
A. that baby             B. the blackboard             C. the picture
(      ) 4. This is my ______ David.
A. grandpa             B. father             C. cousin
(      ) 5. A: Are ______ twins?   B: Yes, ______ are.
A. you; we             B. they; they             C. you; they
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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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