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Today is Mother’s Day(母亲节). Dabing wants to buy something for his mother. What does he buy? He doesn’t buy a card or a book as usual(通常地). And he doesn’t buy a rose because his father often buys it for his mother. Look! He buys a CD-ROM. He says it can help mother learn English.
1．Dabing buys a rose for his mother on Mother’s Day.2．Dabing wants to buy something on Mother’s Day.
3．He doesn’t buy a book for his mother.
4．Dabing’s father often buys a rose for his mother.
5．The CD-ROM is for learning English.
同类型试题
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
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
