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从发达国家经验看,人均 GDP 达到( B )美元以后,居民食物消费结构升级才基本稳定下来。
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构建农村( )融合发展体系。大力开发农业多种功能,延长产业链、提升价值链、完善利益链,通过保底分红、股份合作、利润返还等多种形式,让农民合理全产业链增值收益。
Fill in the blanks based on what you hear.1【填空题】As long as you are committed to your goals and you are ____about your dreams, you will ____accomplish them.2【填空题】To accomplish ____results in your life, you have to be 100 percent committed and you must be willing to ____your time and effort.3【填空题】There are three steps that you should follow to achieve success: ____, ____, ____.
小能量多次冲击载荷下工作的零件，其使用寿命主要决定材料的（）。
作疲劳试验时，试样承受的载荷为()。
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