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短语,听两遍。
(      ) 1. A. cinema               B. bookstore        C. hospital
(      ) 2. A. plane               B. subway        C. ship
(      ) 3. A. tomorrow               B. tonight        C. evening
(      ) 4. A. postman               B. fisherman        C. scientist
(      ) 5. A. happy               B. worried        C. angry
(      ) 6. A. playing football        B. reading stories        C. doing kungfu
(      ) 7. A. by bus               B. by train        C. take a taxi
(      ) 8. A. see a film               B. take a trip        C. see a doctor
(      ) 9. A. turn on               B. turn left        C. turn right
(      ) 10. A. go to work        B. go to school        C. go to bed
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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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