在PowerPoint 2003中，为了保证在移动对象时，对象沿水平或竖直方向移动，可以在移动对象时按住“Ctrl”键。
RLC串联回路谐振时，（）最大。 ["阻抗","导纳","电压","电流"]
下列哪些植物具有双悬果？（） ["胡萝卜","荠菜","萝卜","芹菜"]
对渠道设计产出的产品因素有哪些？
If a person is unconscious from electric shock，you should first remove him from the electrical source and then（）. ["administer ammonia smelling salts","check for serious burns on the body","determine if he is breathing","massage vigorously to restore circulatio"]
电解槽追加运行的准备工作有哪些？
