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,选出你所听到的单词或词组,并将其字母序号填入题前括号内。注意:每题连续听两遍。
(      ) 1. A. teacher’s desk            B. window                  C. classroom
(      ) 2. A. light                         B. chair                       C. book
(      ) 3. A. picture                      B. blackboard               C. fan       
(      ) 4. A. new                         B. old                         C. long
(      ) 5. A. key              B. pencil                      C. ruler
(      ) 6. A. English              B. Maths                      C. Chinese
(      ) 7. A. green                       B. red                      C. blue
(      ) 8. A. mouth               B. nose                       C. hair
(      ) 9. A. friend              B. teacher                      C. students
(      ) 10. A. quiet              B. friendly                      C. strong
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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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