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两构件通过转动副连接,则两构件间()
以下哪种不属于包装的形式()。
生产事故按其所造成的后果不同,分为机电设备事故,人身伤亡事故,险肇事故(有的称为未遂事故)等三种。
当池塘发生水化现象,采用硫酸铜和硫酸亚铁合剂杀灭后池水应()。
麻黄细辛附子汤的主治病证是()
DNS域名系统空间是一个层次化结构的系统,分为()域,顶级域、二级域等。
直径Ф12mm、频率5MHz纵波直探头在钢中的指向角是()。
托尔斯泰《复活》中最主要的两个人物形象是()
在回流线上带电作业时,要()
某男,37岁,既往无眼病史,出现右,右眼视物模糊变暗15天,检查:视力:右眼0.6,左眼1.5,眼底检查:视乳头颜色正常,边界清楚,动静脉未见明显异常,黄斑部可见2PD大小的水肿区,中心凹反射消失。为进一步明确诊断,需要作下列辅助检查()
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