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,选出句子中你所听到的单词。
(     ) 1. A. science                  B. scientist                 C. cinema
(     ) 2. A. left                       B. right                      C. light
(     ) 3. A. plane                    B. play                      C. subway
(     ) 4. A. word book             B. comic book            C. story book
(     ) 5. A. country                 B. hungry                  C. angry
(     ) 6. A. sheep                    B. ship                       C. stop
(     ) 7. A. straight                  B. strict                    C. sled
(     ) 8. A. today                    B. tomorrow               C. tonight
(     ) 9. A. happy                    B. rabbits                  C. hobbies
(     ) 10. A. crossing               B. hiking                  C. interesting
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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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