学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,选出正确的答语。听两遍。
_____) 1. A. I watched TV.               B. I’m doing homework.
C. I wash my clothes.
_____) 2. A. I’m fine.           B. It was OK.           C. I’m OK.
_____) 3. A. Yes, I did.           B. Yes, she did.       C. Yes, he did.
_____) 4. A. She went shopping.       B. He saw a film.
C. I cleaned my room.
_____) 5. A. Yes, I was.           B. No, he isn’t.       C. Yes, it was.
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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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