学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.65
所属科目:小学英语
听录音,选出听到的单词、词组或句子,本题读两遍。
(      ) 1. A. Canada              B. woman                     C. USA
(      ) 2. A. short              B. friend                     C. grandpa
(      ) 3. A. today              B. children                     C. brother
(      ) 4. A. tall              B. pupil                     C. giraffe
(      ) 5. A. make              B. from                     C. welcome
(      ) 6. A. you              B. boy                     C. family
(      ) 7. A. guess              B. meet                     C. look
(      ) 8. A. actress              B. that                     C. kangaroo
(      ) 9. A. a long tail              B. a fat body              C. two big ears
(      ) 10. A. Be thin.              B. How beautiful!              C. Help each other.
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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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