在垄断竞争产业中,厂商()。 A.提供不可以完全替代的产品 B.根据其他厂商的预期反 发布时间:2018-06-16 15:20 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在垄断竞争产业中,厂商()。A.提供不可以完全替代的产品B.根据其他厂商的预期反应来决策C.将价格设定在等于边际成本的水平上D.是价格接受者
题型:单项选择题 用方框中所给单词的适当形式填空,使短文正确、通顺。(每词限用一次)how, either, be, danger, feel, with, well , lose, swim, weatherSummer is coming. The 小题1:_______ becomes hotter and hotter. A lot of people like小题2:_______ in the swimming pools or in the sea. They think water makes them 小题3:______ cool. But some people are not careful enough. They often think they can swim 小题4: ______ than others and they don't have to worry about anything. So these years, many accidents happened and some people小题5:______ their lives(生命). Most of them were students. As we all know, safety is the most important. Do you know 小题6: ______ to protect(保护)yourself? To protect yourself, you must be careful. Remember not to swim in a 小题7:______ place. Don't swim alone, and when you sec a “No Swimming” sign, don't swim, 小题8:_______. Of course, you can swim 小题9: _______ someone who can keep you safe. If you remember these, swimming 小题10:_______ safer. 查看答案
题型:单项选择题 用于涡流试验的试样().A.必须有诸如槽口或钻孔等人工缺陷B.必须有诸如夹杂和裂纹等自然缺陷C.必须没有可检出的缺陷D.可具有人工或自然缺陷,也可无缺陷,依试验系统和试验的类型而定 查看答案
题型:单项选择题 患者陈某,有风湿性关节炎病史,心脏听诊主动脉瓣区有舒张期杂音,疑有主动脉瓣关闭不全,用彩色多普勒技术检查应有什么表现()A.左心室在收缩期有血流射入肺动脉B.显示有血流从主动脉瓣口在舒张期流向左心室C.收缩期有血流从右心房流入右心室D.左心室在收缩期无血流射入主动脉E.收缩期有血流从左房流入左心室 查看答案