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Qian Xuesen was born in Shanghai on December 11,1911. He is known as the father of China’s space program (航天计划).When he was 24 years old, Qian went to America for further (更进一步的) studies. In 1955, he came back to China though the American government tried to stop him. Then, he devoted himself to science, especially to the space program. He helped build China’s rockets，missiles(导弹) and satellites (卫星). Mr Qian has been dead for many years, but he will live in the memory (记忆) of Chinese people forever，.
1．Qian Xuesen is called the father of Chinese atomic science.2．Qian Xuesen went to America for further studies.
3．When he was 24 years old, Qian Xuesen came back to China.
4．Qian Xuesen helped build China’s rockets, missiles and satellites.
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
