皮皮学，免费搜题
登录
搜题
【多选题】
在小张绘制圆锥形薄壳基础的的过程中,以下说法有哪些是正确的?A.
圆锥形薄壳基础是由四棱柱和圆锥而成的体。
B.
在求的时候，可以看做是四棱柱的四个棱面分别切割圆锥，得到的四条截交线，连接起来就是该基础的。
C.
在用四棱柱的四个棱面分别切割圆锥时，发生的都是同一种截切形式：平面与圆锥轴线平行，其截交线是抛物线。
D.
在三视图中，点C、G是正面图的最高点，点D、H是侧面图的最高点。
E.
在三视图中，点A、B、E、F分别是四棱柱的四条棱线与圆锥面的交点，也是的最低点。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】How does monopolistic competition differ from perfect competition?
A.
In a market characterized by monopolistic competition, individual firms have some control over price.
B.
There are more sellers in a market characterized by monopolistic competition.
C.
In a perfectly competitive market, products are more dissimilar.
D.
It is easier for sellers to enter a market/industry characterized by monopolistic competition.
【单选题】Monopolistic competition differs from perfect competition primarily because______.
A.
in monopolistic competition, firms can differentiate their products
B.
in perfect competition, firms can differentiate their products
C.
in monopolistic competition, entry into the industry is blocked
D.
in monopolistic competition, there are relatively few barriers to entry
【多选题】谈及曹操的《蒿里行》其艺术价值不凡,以下对该作品赏析正确的是( )。
A.
真实反映了汉末的现实，堪称“汉末实录”。
B.
是曹操按旧题写的新辞，表达作者一统天下的抱负。
C.
该诗的背景起于曹操北征乌桓升胜利班师回朝有感而发。
D.
该诗在艺术气质方面具有“古直悲凉”的特点，需要细细体味才能理解。
E.
该浑厚质朴，不加雕琢；慷慨悲凉，富于同情心。 答案:AE
【简答题】平面交叉口有何交通特征?如何减少或消灭交叉口冲突点?
【单选题】One difference between perfect competition and monopolistic competition is that
A.
a perfectly competitive industry has fewer firms.
B.
in perfect competition, firms produce slightly differentiated products.
C.
monopolistic competition has barriers to entry.
D.
firms in monopolistic competition face a downward-sloping demand curve.
【简答题】平面交叉口有何交通特征？如何减少或消灭交叉口冲突点？
【单选题】An example of' product in monopolistic competition is ______ .
A.
corn
B.
electricity
C.
airline tickets
D.
coffee
相关题目：
参考解析：
知识点：
题目纠错 0
发布
