学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听问句,选出正确的答句。
(     ) 1. A. Four.              B. Sure.       C. It’s OK.
(     ) 2. A. She’s my friend.       B. She’s my mother.       C. He’s my father.
(     ) 3. A. Goodbye!       B. OK!       C. How funny!
(     ) 4. A. No, thank you.       B. Wow, so beautiful!       C. Welcome!
(     ) 5. A. It’s in the pencil box.       B. Oh, no!       C. Thank you.
(     ) 6. A. Thank you.       B. Great!       C. Certainly.
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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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