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| From: To: Subject: | Iris Marie Experience |
| Dear Marie, I’ve been in Beijing for a month. I stay in a modern hotel 1． lies in the center of the city. I have visited many wonderful places, for example, 2． Great Wall of China. I have also met a lot of very friendly people here. Now I’m trying to learn Chinese from them and I am quite interested 3． it. Chinese food is really delicious and hot pot is my favorite. In China, it is interesting 4． see people eating with chopsticks. I’m practicing using them and I am getting more 5． more skillful now. I want to come back again next year. I hope you can come with me. Iris | |
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
