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,选出你所听到的单词、短语或句子。
(      ) 1. A. arm             B. again                           C. and
(      ) 2. A. doctor             B. door                           C. down
(      ) 3. A. farmer             B. fine                           C. foot
(      ) 4. A. hand             B. head                           C. his
(      ) 5. A. new             B. name                           C. nurse
(      ) 6. A. sit                    B. stand                           C. say
(      ) 7. A. a cat             B. a dog                           C. a bird
(      ) 8. A. in the bag       B. on the book                    C. in the desk
(      ) 9. A. Look, my new bag!        B. Look, my new kite!        C. Look, my new ball!
(      ) 10. A. I'm six.       B. I'm eight.                    C. I'm ten.
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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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