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Mr. Smith looks young, but he is sixty-eight years old. He has some children. One of his sons is a doctor. The other is studying in America. The daughter is working with her father. Now, Mr. Smith works in a factory near here. He thinks Chinese people are friendly and Chinese food is very good. He can speak a little Chinese. So he goes to Chinese classes every day. He says it is hard to learn Chinese. And he must study hard.
1．Mr. Smith is a young man.2．Mr. Smith has three children.
3．Mr. Smith's daughter is studying in America.
4．Mr. Smith thinks Chinese people are not friendly.
5．He says it's hard to learn 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
