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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,根据你所听到的对话,选择正确的答案,将其字母标号填入题前括号内。每段对话读两遍。
(      ) 1. How tall is the elephant?
A. Maybe 2 metres.        B. Maybe 4 metres.        C. Maybe 6 metres.
(      ) 2. How heavy is John?
A. 50 kilograms.        B. 55 kilograms.        C. 52 kilograms.
(      ) 3. Was there a library in Grandpa’s old school?
A. Yes, there was.        B. No, there wasn’t.        C. No, there isn’t.
(      ) 4. Where did John go last Saturday?
A. A museum.        B. A mountain.        C. A library.
(      ) 5. How was Mike’s weekend?
A. It was too bad.        B. It was good.        C. It was great.
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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

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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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