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
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. space                    B. postcard                 C. post office
(      ) 2. A. tonight                  B. tomorrow             C. today
(      ) 3. A. notebook               B. word book             C. comic book
(      ) 4. A. moon                    B. film                      C. poem
(      ) 5. A. visit                      B. trip                       C. take
(      ) 6. A. this morning          B. this evening            C. this afternoon
(      ) 7. A. draw pictures        B. wash clothes            C. make mooncakes
(      ) 8. A. bookstore             B. dictionary               C. postcard
(      ) 9. A. some                    B. soon                      C. summer
(      ) 10. A. water                 B. word                      C. work
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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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