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Many years ago, people in the West did not know coffee or tea. They were afraid to drink them because they thought coffee and tea could kill a person. The king of England decided to find out whether it was true or not. At that time there were two brothers in the prison. They would be killed in a few days because they did wrong things. The king said,"I shall let them live, but they must drink coffee or tea to the end of their life. One must drink coffee and the other must drink tea every day. ”And they remembered the king's words. They really lived for many years. At last, the elder brother died when he was eighty- three years old. The younger one died a few years later. After that, people knew that coffee and tea were not bad for people.
1．Many years ago people in the West didn't know tea.2．They thought coffee is poison(毒药).
3．The two brothers didn't do wrong things.
4．The two brothers drank tea or coffee every day.
5．The elder brother lived to be 73 years old.
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
