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:0.94
所属科目:小学英语
听录音,选出你所听到的单词、词组或句子,读两遍。
(      ) 1. A. at                           B. dad                           C. cat
(      ) 2. A. tea                           B. pie                           C. see
(      ) 3. A. shoe                           B. shirt                           C. fish
(      ) 4. A. fine                           B. fat                           C. fan
(      ) 5. A. toy                           B. tail                           C. doll
(      ) 6. A. here                           B. hair                           C. year
(      ) 7. A. lion                           B. listen                           C. pencil
(      ) 8. A. 20 boys                    B. 30 girls                    C. 40 pears
(      ) 9. A. a bag of rice             B. a cup of coffee             C. a glass of juice
(      ) 10. A. How old is she?              B. How are they?             C. How much is it?
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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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