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Jenny: Yesterday we bought gifts. Tomorrow is Christmas. We are going to open our gifts. Today we are going to put up the Christmas tree. Let's ask Danny to help us put up the Christmas tree.
Li Ming: Okay!
Jenny: Hello, Danny. Would you like to help us put up our Christmas tree?
Danny: Sure!
Jenny: First, we are going to put the lights on the tree. Then we are going to put Christmas things on the tree. Danny, would you like to put the star on the tree?
Danny: Yes, the star always goes on top!
Jenny: Now, let's put our gifts under the tree. There! It's done!
Li Ming: It's beautiful!
1．What did they do yesterday?
2．What are they going to do today?
3．Do they ask Danny to help them put up the Christmas tree?
4．What's under the tree?
5．Is the Christmas tree beautiful?
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
