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On May 22, 2021, people in China and around the world felt sad because China’s “father of hybrid rice（杂交水稻）” Yuan Longping died.
Yuan worked as a teacher at an agriculture（农业） school in An Jiang, Hunan after graduation. Seeing many people die of hunger from 1959 to 1961, he decided to study hybrid rice.
Yuan spent four years looking for a wild rice strain（品牌） that could be crossed（杂交）. In 1964, he found it!
Yuan put all his life into creating hybrid rice, which ended hunger for millions of people not only in China, but around the world. Hybrid rice is grown in 57 percent of China’s rice fields. It is also grown in over 40 countries, including India, the US and Brazil.
In 2020, Yuan’s team set a new world record in growing hybrid rice.
Yuan was not only a great scientist but also a talented man. He had many hobbies, such as volleyball, swimming and violin.
Though he has left, we will respect and remember him forever.
1．Why did people in China and around the world feel sad on May 22, 2021?2．Did Yuan work as a teacher at an agriculture school in An Jiang, Hunan?
3．What did Yuan spend four years looking for?
4．How many countries is the hybrid rice grown in?
5．What hobbies did Yuan have?
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
