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,根据所听内容,选出正确的答语,将其序号填入题前括号内。
(      ) 1.A. Yes, they are.                 B. Yes, there are.        C. They are some reading rooms.
(      ) 2.A. No, it does.                      B. No, it doesn’t.        C. Yes, he does.
(      ) 3.A. There are one.             B. There are 80.          C. It’s 80.
(      ) 4. A. I like watching films.     B. He likes drawing.   C. He likes his animal friends.
(      ) 5. A. He has a book.            B. I have some books.   C. We don’t have any books.
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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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