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,根据对话内容回答问题。
听第一组对话,回答第1~2小题。
(      ) 1. How tall is the girl?
A. She’s 1.56 metres.                                   B. She’s 1.52 metres.
(      ) 2. Is Joe twelve years old?
A. Yes, he is.                                                B. No, he isn’t.
听第二组对话,回答第3~4小题。
(      ) 3. Does Lucy often watch TV on Mondays after school?
A. Yes, she does.                                         B. No, she doesn’t.
(      ) 4. When does Lucy visit her grandma?
A. On Saturdays.                                         B. On Sundays.
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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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