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
听问句,选答语。
______) 1. A. She’s from England.           B. I’m from China.         C. He’s from England.
______) 2. A. I’m a Chinese girl.            B. I’m 12 years old.         C. I’m from Beijing.
______) 3. A. It’s cool and windy.            B. It’s cold and snowy.       C. It’s hot and sunny.
______) 4. A. There are four.                B. There are three.          C. There are twelve.
______) 5. A. I am a worker.                B. He is a farmer.           C. She is a nurse.
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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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