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:0.40
所属科目:小学英语
听录音,根据听到的对话内容选择最佳答案,并将其序号填在题前括号内。听两遍。
( ) 1. Where are they?
A. In a library.          B. In a bookshop.        C. In a hospital.
( ) 2. Did Bob come to school by taxi yesterday morning?
A. Yes, he did.        B. No, he didn’t.        C. Sorry, I don’t know.
( ) 3. What festival is coming soon?
A. Chinese New Year.       B. Mother’s Day.       C. Mid-Autumn Festival.
( ) 4. What does Mary have for breakfast?
A. Some noodles.          B. Some vegetables.        C. Some bread and milk.   
( ) 5. When are they going to meet?
A. 6:30       B. 7:50       C. 6:15
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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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