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,选择正确的答语。
____) 1. A. It's on the first Sunday in May.
B. It's on the second Sunday in May.
C. It's in June.
____) 2. A. We often have a Christmas party.
B. I will do my homework.
C. I want to dance with Tina.
____)3. A.It's on June 1st.
B. It's on July 1st.
C. It's on May 1st.
____) 4. A. Yes, she is.
B. No, she isn't.
C. No, it isn't.
____) 5. A. There are twelve.
B. The twelfth.
C. There are ten.
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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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