自动变速器从N挡换入D挡的时滞时间一般应小于() ["0.5~1.0s","1.0~1.2s","1.2~1.5s","15~2.0"]
层采样深度,农作物土壤一般深()。 ["0~5cm","0~15cm","0~20cm","0~25cm"]
“匠人营国,方九里,旁三门,国中九经九纬,经涂九轨,左祖右社,面朝后市,市朝一夫”出自哪本书()。 ["《考工记》","《园冶》","《营造法式》","《永乐大典》"]
什么叫做开放型磁系?
某债券面值为1000元,票面年利率为10%,期限5年,每半年支付一次利息。若市场利率为10%,则其发行时的价格将()。
贸易量