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
听录音,选择正确的答案。
(      )1. Who is our new teacher?
A. Mr.Wang.             B. Mr.Li.       C. Mr.Wood.
(      )2. Where is Danny?
A. He is in the room.        B. He is under the tree. C. He is beside the desk.
(      )3. How many boys are there in the class?
A. 7.        B. 17.        C. 70.
(      )4. How’s the weather in December?
A. It’s cold and snowy.        B. It’s hot and sunny.       C. It’s warm and windy.
(      )5. When is your mother’s birthday?
A. November 15.              B. August 16.        C. October 21.
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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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