行政区划是（）制度的产物。 ["奴隶","分封","中央集权","地方自治"]
整车落成旁承间隙不符时可用以下方法调整：转8AG、转8G型更换下旁承座，且下旁承座底部高度不大于（）。 ["20mm","25mm","30mm","36mm"]
She declined to travel at the（）of her company and paid for the trip herself. ["charge","admission","expense","ti"]
减少因人员和部门重复造成的资源浪费情况属于全球地区结构的优点之一
下列不属于防止中、高碳钢零件补焊过程中产生裂纹的措施是（）。 ["焊前预热","满足零件的工作条件","选用多层焊","焊后热处理"]
一个人在地球能跳1米高，那他在月球能跳几米高？
