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
Listen and choose.下面五个小题中,每题有两个选项。仔细听录音,根据你所听到的问句选择相应的答语,并将其字母标号填入题前括号内。每个问句读三遍。
(     ) 1. A. I’m watching TV at home.            B. I often watch TV at home.
(     ) 2. A. It’s in November.            B. It’s in September.
(     ) 3. A. Because it’s warm.            B. Because I like snow.
(     ) 4. A. Yes, it does.            B. Yes, it is.
(     ) 5. A. It’s Zhang Peng’s.            B. They're Zhang Peng’s.
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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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