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
Listen and choose. (听一听,选择最佳答案,将字母代号写在前面的括号内)
(      ) 1. My grandfather has a _____.        A. big farm        B. small farm   C. small zoo
(      ) 2. There are ______ cows there.        A. four               B. five                  C. ten
(      ) 3. The sheep like ________.               A. corn               B. hey                    C. grass
(      ) 4. The _______ are fat.                     A. ducks               B. hens                  C. pigs
(      ) 5. The dog has no sharp _____.        A. meat                 B. bones            C. teeth
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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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