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
你将听到10个单词、词组或句子。从每组中选出你所听到的内容,并将编号填入前面的括号内。读三遍。
(      ) 1. A. pupil                                 B. pencil
(      ) 2. A. desk                                 B. chair
(      ) 3. A. arm                                   B. mouth
(      ) 4. A. teacher                              B. doctor
(      ) 5. A. father                                B. brother
(      ) 6. A. eleven                              B. eight
(      ) 7. A. a yellow dog                      B. a red cat
(      ) 8. A. Point to the door.                 B. Point to the window.
(      ) 9. A. Stand up!                           B. Sit down, please.
(      ) 10. A. This is his leg.                  B. This is her foot.
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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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