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:0.85
所属科目:小学英语
听录音,选出句中你所听到的内容。
(     ) 1. A. Internet                         B. interesting                         C. anywhere
(     ) 2. A. ball                              B. call                                   C. doll
(     ) 3. A. email                            B. e-book                              C. e-friend
(     ) 4. A. book                            B. radio                                 C. TV
(     ) 5. A. telephone                       B. elephant                            C. mobile phone
(     ) 6. A. every day                       B. on holiday                         C. on Sunday
(     ) 7. A. goes home                      B. goes on                              C. goes back
(     ) 8. A. look out of                      B. look after                           C. look for
(     ) 9. A. waiting for                      B. what for                            C. watch a film
(     ) 10. A. wrote letters                  B. used the telephone               C. read newspapers
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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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