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Wu Dong has a good friend. His name is Peter. He is from the U. S. Wu Dong and Peter are in the same class. They go to school five days a week. They stay at home on Saturday and Sunday. Peter likes China and Chinese food. He likes rice cakes very much. At school they play ping-pong after class. Wu Dong and Peter like making things. Now they are making a plane. They like flying planes on Sunday morning. Peter speaks English and a little Chinese. Wu Dong speaks Chinese and a little English. They always teach each other (互相).
1．Wu Dong has an American(美国的) friend. （2．They go to school from Monday to Friday. （
3．They often fly planes after class. （
4．Peter and Wu Dong like to make things. （
5．Wu Dong teaches Peter English and Peter teaches Wu Dong Chinese. （
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
