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:0.85
所属科目:小学英语
听句子,选答语。你将听到一个句子,请选择正确的答语,并将其序号填入题前括号内。
(     ) 1. A. It’s Thursday.        B. Yes, I did.        C. It’s July 30th.
(     ) 2. A. She’s at school.        B. She’s a singer.        C. She’s singing.
(     ) 3. A. Good idea.        B. You are welcome.        C. I like them.
(     ) 4. A. It’s forty.        B. It’s fifty-three.        C. It’s thirteen.
(     ) 5. A. It’s Christmas Day.        B. It’s Chinese New Year.        C. It’s Children’s Day.
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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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