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Today is my birthday. After school, I came back home and found balloons hanging(悬挂) in my room and a big cake on the table. I'm sure(确信) it's mum's work. My mother is a doctor. I invited(邀请) three friends to my birthday party. They came with their lovely presents: a dictionary, a doll and a kite.
1．The balloons were hanging in my mother's room. （_____）
2．A big cake is on the table. （_____）
3．I invited three friends to my birthday party. （_____）
4．My mother is a teacher. （_____）
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
