学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
听录音,给所听问句选择恰当的答语。
_____) 1. A. Yes, he did.                  B. Yes, I do.                    C. No, he did.
_____) 2. A. He usually does his homework.  B. I usually do my homework.     C. I did my homework.
_____) 3. A. No, I’m not.                B. Sorry, I don’t.                 C. Yes, he is.
_____) 4. A. No, she doesn’t.             B. No, he didn’t.                 C. Yes, I do.
_____) 5. A. This is me.                 B. It’s me.                   C. It’s mine.
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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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