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
Listen and choose. 听录音,选择你所听到的单词或短语。
(      ) 1. A. amazing             B. ask              C. attention
(      ) 2. A. bus                     B. buy              C. but
(      ) 3. A. far                     B. car              C. fast
(      ) 4. A. happy              B. head              C. half
(      ) 5. A. interesting        B. if              C. ill
(      ) 6. A. right              B. tonight        C. light
(      ) 7. A. stop                     B. stay              C. street
(      ) 8. A. postcard              B. postman        C. post office
(      ) 9. A. worry              B. worried        C. wrong
(      ) 10. A. reporter              B. restaurant        C. read
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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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