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,为问句选择合适的答语。
(     ) 1. A. Yes, I have.          B. Yes, she has.        C. No, she can't,
(     ) 2. A. Yes, it does.          B. Yes, they do.        C. No, they don't.
(     ) 3. A. She has got a postcard from the US.
B. I have got a stamp from Canada.        
C. No, I haven't.
(     ) 4. A. They live in the house.            B. They live in the water.
C. They live in the tree.
(     ) 5. A. I have got a cap from the US.   B. I have got a Chinese book.
C.I have got an American friend.
(     ) 6. A. It’s about five thousand metres long.
B. It’s got about seven million people.
C. There’re 193 member states there.
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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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