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
Listen and choose. 听句子,选出你所听到的单词或词组,每题读两遍。
(      ) 1. A. by                    B. bus                      C. bike
(      ) 2. A. fat                    B. far                       C. fast
(      ) 3. A. pay                  B. plane                    C. plant
(      ) 4. A. a green light       B. a red light             C. a yellow light
(      ) 5. A. a life boat          B. a helmet               C. a life jacket
(      ) 6. A. subway             B. road                    C. cousin
(      ) 7. A. often                 B. morning               C. China
(      ) 8. A. do                    B. Mr                       C. how
(      ) 9. A. nice                  B. traffic                  C. on
(      ) 10. A. cross               B. light                      C. over
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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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