In Amy’s class, every student has a pen pal. Miss White helps them to send letters once a week. Amy knows her pen pal goes to school by bus, and her pen pal’s mother is a teacher. Her pen pal’s father is a doctor. Her pen pal has a happy family.
( ) 1. In Amy’s class, every student doesn’t have a pen pal.( ) 2. Mr. Black helps them to send letters.
( ) 3. Amy’s pen pal goes to school by car.
( ) 4. Her pen pal’s mother is a teacher and father is a doctor.
( ) 5. Her pen pal has a happy family.
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同类型试题
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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
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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
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