学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,选择正确的答语。 (听两遍)
(      ) 1. A. We eat zongzi.                                         B. We say “thank you” for our food.
C. We have a big family dinner.
(      ) 2. A. No, I ean’t.              B. I’ve got a lot.        C. Yes, I have.
(      ) 3. A. About 10, 000 metres.                            B. About 13, 400 metres.
C. More than 20, 000 kilometres.
(      ) 4. A. Yes, I have.              B. Yes, I can.              C. Yes, I do.
(      ) 5. A. It’s in the east.              B. It’s in the north.        C. It’s in the south.
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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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