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单选题 How much did the yield of conventional rice increase with the advent of high-yield hybrid rice
学科：默认课程
时间：2025-12-22 17:32:53
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题目1单选题
When did Yuan Longping pass awayA. May 22, 2020B. May 22, 2021C. June 22, 2021D. June 22, 2020
题目2单选题
What was Yuan Longping's discovery in 1961 that challenged the popular theoryA. A new type of fertilizerB. An outstanding rice plant that was natural hybrid riceC. A way to grow rice fasterD. A disease—resistant rice variety
题目3单选题
How much did the yield of conventional rice increase with the advent of high-yield hybrid riceA. About 10 percentB. About 15 percentC. About 20 percentD. About 25 percent
题目4单选题
What did Yuan Longping do in 1980A. He retired from his research workB. He donated key rice varieties to the international communityC. He stopped visiting the research stationD. He received a major international award
题目5单选题
What were Yuan Longping's two dreamsA. To become rich and famous, and to travel around the worldB. For super rice to grow very tall and for hybrid rice to be grown all over the worldC. To live a comfortable life and to write a book about riceD. To have a large farm and to teach more students
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