学进去-教育应平等而普惠
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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,根据对话内容选择恰当的选项。
(     ) 1. Chen Jie usually start class at ________.
A. 7: 30       B. 6: 30       C. 7: 00
(     ) 2. Amy and John are ________.
A. drinking water       B. taking pictures       C. in the kitchen
(     ) 3. My sister's birthday is on ________.
A. March 3rd       B. May 1st       C. March 1st
(     ) 4. The black dog is ________.
A. mine       B. Amy's       C. ours
(     ) 5. Mike is ________.
A. playing football       B. watching TV       C. reading a book
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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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