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,选出正确的答句。
(      ) 1. A. Yes, I am.                                    B. No, you can’t.                                        C. Yes, we do.
(      ) 2. A. It’s 2 o’clock.                      B. It’s sunny and warm.             C. Yes, it is.            
(      ) 3. A. They’re 89 yuan.              B. It’s 89 yuan.                           C. I’m 12.
(      ) 4. A. It’s Chen Jie’s.                    B. They’re mine.                          C. They’re Chen Jie’s.
(      ) 5. A. They are carrots.               B. Yes, it is.                               C. Yes, they are.
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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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