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,选择相应的答语,将其序号填入题前括号里。
(      )1. A. No, he can't.                  B. Yes, I can.                    C. Yes, he can.
(      )2. A. He is from China.                 B. She is from China.                 C. I'm from China.
(      )3. A. Yes, I got.                           B. Yes, I have.                       C. Yes, I do.
(      )4. A. A stamp from Canada.             B. A stamp from China.             C. Yes, I have got a stamp from Canada.
(      )5. A. I want to go swimming.             B. I have got a kite.             C. I want a new computer.
(      )6. A. Pleased to meet you too.             B. Thank you.                      C. Yes, of course.
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优质答疑

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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