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| A．It tastes nice. | B．I boil the water first. | C．First, I find three cups. |
| D．What’s next?. | E．I’m making coffee. | F．One is for you, one is for Dad and one is for me. |
Ben: 1．
Mum: Really? How do you do it?
Ben: 2．
Mum: OK. 3．
Ben: I put three packets of coffee powder in three cups. 4．
Mum: Good. And then?
Ben: The water is boiled. I pour the hot water into the cups. Then mix them.
Mum: Now we can drink the coffee. 5．. Thank you, Ben.
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
