此试题出现在
王老师在讲授“郑和下西洋”这一子目内容时,为了方便学生对郑和船队的行进路线、到达的地点有直观了解.特地准备了“郑和下西洋路线示意图”和电视剧《郑和下西洋》中的相关片段。王老师的做法符合中学历史教学原则中的()
如果黄色果实(Y)对绿色果实(y)为显性,矮株(L)对高株(l)是显性,那么YyLl基因型的植株和yyll基因型的植株杂交,则()。
常用作车刀材料的硬质合金有()和()两类。
前台员工在给客人递资料时应保持什么姿势()
使用“螺纹”工具绘制螺纹形式时,每圈螺纹间距固定不变的是()
直流泄漏电流测量施加的直流试验电压较高,属于破坏性试验。
用β受体阻滞剂治疗扩张型心肌病合并心力衰竭,下列用药中何项错误()。
胸部损伤造成呼吸困难的原因( )
常用的定位结构有:();();()和各种挡圈。
某病期间患病率是()
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