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【简答题】
根据自动控制系统是否设有反馈环节来分类，控制系统可分为开环控制系统和（）控制系统。
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皮皮学刷刷变学霸
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【单选题】听力原文： At a certain time in our lives we consider every place as the possible sites for a house. I have thus searched the country within a dozen miles of where I live. In imagination I have bought all ...
A.
He made money by buying and selling farms.
B.
He made a study of many farms before buying.
C.
He had the money to buy the best farm in the country.
D.
He wanted to buy the oldest farm near where he lived.
【多选题】太平天国运动的历史功绩和历史意义主要有：
A.
旧式农民战争的最高峰，具有不同于以往农民战争的新的历史特点
B.
沉重打击了封建统治阶级，撼动了清政府统治的根基，加速了清王朝的衰败过程
C.
冲击了孔子和儒家经典的正统权威，削弱了封建统治的精神支柱
D.
打击了外国侵略势力，是 19 世纪中叶亚洲民族解放运动中时间最长、规模最大、影响最深的，冲击了西方殖民主义者在亚洲的统治
【简答题】With the popularity of 3D movies over the past several years , there was no doubt that the technology would make its way into our homes, The question is: Is it really a technology that is going to sta...
【单选题】妊娠早期的护理正确的是
A.
提醒孕妇晨起禁止吃饼干，多吃些水果
B.
有尿频尿急时，告知孕妇不宜憋尿，应尽量排空
C.
提醒孕妇减少液体摄入
D.
因白带增多，指导孕妇要每1～2天清洗外阴1次
E.
怀孕期间阴道分泌物增加应视为异常，进行检查
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