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
根据你听到的句子选择正确的答语,并将其标号填入题前括号内。每个句子读两遍。
(      ) 1. A. Here it is.                           B. Yes, I do.
C. Yes, I’d like some eggs.
(      )12. A. It’s good.                           B. It’s under the chair.
C. It’s a cat.
(      ) 3. A. They’re hot dogs.             B. It’s a hot dog.
C. It’s white.
(      ) 4. A. She’s in the classroom.       B. She’s singing.
C. I’m running.
(      ) 5. A. They are eating grass.       B. The goats are behind the house.
C. There are some goats behind it.
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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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