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,选择正确的答句。(听两遍)
(     ) 1. A. I had a good time yesterday.     B. I went to the zoo with my friends.     C. I had noodles and fish for dinner.
(     ) 2. A. Yes, I can sing.            B. The letter is from China.          C. Yes, it is.
(     ) 3. A. I had a hamburger for breakfast.       B. I went to the zoo.       C. I will visit Shanghai tomorrow.
(     ) 4. A. Fine, thank you.                  B. He is seven years old.               C. I am from the UK.
(     ) 5. A. No, he isn't at home.             B. Yes, I am.                              C. I will go to the park.
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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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