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
听短对话,根据你所听到的对话和问题选择正确的答案,将其序号填入题前括号里。
(     ) 1. A. No. He is reading a book.       B. No, he isn't.       C. Yes, he is.
(     ) 2. A. They are some stamps from Canada.
B. They are some stamps from China.
C. They are some stamps from the US.
(     ) 3. A. Dragon cakes.       B. Zongzi.       C. Moon cakes.
(     ) 4. A. People sing songs about the moon at the Lantern Festival.
B. People hang lanterns and do dragon dances at the Lantern Festival.
C. People watch a big football game on TV at the Lantern Festival.
(     ) 5. A. The Spring Festival.       B. The Lantern Festival.        C. The Dragon Boat Festival.
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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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