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Do you know these people? They make our country change.
Yuan Longping is “the Father of Hybrid Rice”(杂交水稻之父). Its output(产量) is much greater than common kinds of rice. His study helps Chinese people have enough food.
Tu Youyou discovered artemisinin(青蒿素) and won the Nobel Prize in 2015. People use the drug to save thousands of lives every year.
Zhong Nanshan, more than eighty years old, is an outstanding(杰出的) respiratory(呼吸的) scientist. His study about SARS saved many people in 2003. At the beginning of 2020, he worked hard to help people fight the COVID-19 virus(新冠病毒).
1．Yuan Longping’s study helps Chinese people have enough food.2．Tu Youyou won the Nobel Prize in 2016.
3．Zhong Nanshan is not young, but he helps a lot of sick people.
4．Zhong Nanshan’s study about SARS saved many people in 2013.
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
