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
听对话,选择与对话内容相符的选项,并将代表这个选项的字母代号填写在题前括号内。
(       ) 1. There are ______ students in our class.
A. 20               B. 24             C. 44
(       ) 2. It’s ______ o’clock now.
A. 2                     B. 8        C. 12
(       ) 3. It’s ______ in Wuhan.
A. sunny and hot       B. sunny and windy       C. windy and hot
(       ) 4. Those are ______.
A. potatoes             B. tomatoes             C. carrots
(       ) 5. He likes the ______.
A. green shirt       B. blue sweater       C. red hat
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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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