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Last Sunday was April 9th. The weather was cloudy. Mary was busy. She did her homework on that morning. She didn’t feel worried. Because the homework was so easy. Then she went shopping with her mother. They bought some food, apples and bananas. Her mother bought a new dress for her. She was very excited (兴奋的). In the afternoon, she visited her grandpa. He had a headache. He took medicine (药) and stayed in bed. She did housework for him. She cleaned his room, watered the flowers, washed his clothes and cooked supper. She was very tired, but she was very happy.
1．It was sunny last Sunday.2．Mary did her homework on that morning.
3．Mary’s grandpa had a headache. But he didn’t take medicine.
4．Mary watered the flowers and cooked supper for her grandpa.
5．Mary was very tired, but she was very happy.
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
