学进去-教育应平等而普惠
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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,选择相应的答语,将其序号填入题前括号里。
(      ) 1. A. Yes, she can.                           B. No, he can’t.                           C. Yes, I can.
(      ) 2. A. I get up at six o'clock in the morning.   B. I go to bed at nine o'clock in the evening.
C. I go to school at half past seven in the morning.
(      ) 3. A. Yes, you do.                           B. Sorry, you can.                    C. Sorry, you can’t.
(      ) 4. A. I did homework.                    B. He read a book.                    C. I am doing homework.
(      ) 5. A. I have music at nine.              B. I had music.                    C. I can play chess.
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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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