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Zheng He was born in 1371. He was a Ming dynasty explorer. We Chinese people are proud of him. As a captain and palace official, he led seven ocean journeys from 1405 to 1433. At that time, the compass played an important role in his sailing. He even succeeded in sailing to the east coast of Africa. His last journey was more than half a century earlier than Columbus’ first journey to America. He was a great explorer. He is really the pride of China. He died of illness on his way home from Africa in 1433.
1．Zheng He was a captain of Tang dynasty.2．He led seven ocean journeys from 1405 to 1433.
3．He died at the age of 28 years old.
4．The Chinese people are proud of him.
5．His last ocean journey was more than half a century earlier than Columbus’ first journey to America.
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
