题目

贾思勰《齐民要术》中记载的魏晋南北朝农业生产工具只有三十多种，到元代，王帧《农书》中记载的农具已多达一百零五种，这些新式农具广泛利用了机械原理，据此可知我国古代农业( )A.到元代发展到顶峰B.利用近代科技发展生产C.经营方式发生改变D.精耕细作模式日益完善 答案：【答案】D【解析】材料“农业生产工具只有三十多种”“农具已多达一百零五种”体现了生产工具的改进，而生产工具的改进是精耕细作农业生产模式的完善的表现之一，故D项正确，C项错误；A项不符合史实；材料体现的是古代农具的改进，故B项错误。故答案为D。   In autumn and winter the air is very dry .You may find that your nose often hurts .Sometimes，it even bleeds（流血）W shouldn’t _____to make a nosebleed stop. ①     Lift up your head. ②     Sit or stand with your head forward（前倾）. ③     Press（按压）your nose for about 10 hours to make the bleeding stop. ④     Put some ice in a cloth and place the cloth on your head. ⑤     Get some tissues（纸巾）or a cloth to catch the blood. A. ③④⑤       B. ①③④      C.②④⑤