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| Christmas Santa bring toys take pictures would like Christmas lights a box of tea Western holiday Christmas tree be getting ready |
Jenny's family 1． for a holiday. It's a 2．. It's on December 25th. It's 3．. Yesterday, Jenny and I went to a shop. We saw a merry man in red clothes. He is 4．. He 5． for children. I 6． a camera. I want to 7．. I want to buy 8． for Jenny's father. Today Lynn and I put up the 9．. Mr. Smith and Bob put some 10． on the house.
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
