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Mary and Bob had a busy Sunday yesterday. In the morning, Mary read books and drew some pictures. She will take part in drawing contest this Friday. Bob did his homework in his study. In the afternoon, Mary visited her good friend, Amy. They played table tennis happily together. Bob went to a farm with his father. They went fishing there. It was great fun. In the evening, Mary made a new dress for her doll. It's a birthday present from her grandparents.
What about Bob? Oh! He listened to music and read some storybooks.
yesterday morning | yesterday afternoon | yesterday evening | |
Mary | |||
Bob |
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
