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
你将听到两段对话,选择正确信息,将其字母标号填在题前括号内。
第一段对话。
(     ) 1. When is Mike’s birthday?
A. June 10th.        B. July 10th.        C. July 20th.
(     ) 2. How old is Mike?
A. Eight.       B. Nineteen.       C. Nine.
第二段对话。
(     ) 3. What does Mike borrow?
A. Markers.       B. Books.       C. Crayons.
(     ) 4. How many crayons does Sara have?
A. Sixty.       B. Seventy.       C. One hundred.
(     ) 5. What does Mike collect?
A. Stickers.       B. Erasers.       C. Rulers.
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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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