皮皮学,免费搜题
登录
搜题
【简答题】
English New Words New words enter the English language all the time. In fact, English has always been in a state of . In recent years more and more words and have entered the language. It's partly due to the increased of editors to include them in the dictionaries. But where do all these words come from? Words come out of the culture they and describe. So if you've got a new development in , for example, bird flu,then you'll get the new word coming out of that. If there's a conflict,that may well bring all sorts of new words to the fore. Going back in time the First and Second World Wars were times of great of language because people from different countries each other and their words and words developed from there. So really words come from the playground, and any area of life because every area of lifeis changing from day to day.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】在短期成本曲线中,SAC曲线是( )。A. 从原点向STC曲线所引射线的斜率; B. 受可变投入的边际报酬递减规律影响呈U型; C. 从原点向TVC曲线所引射线的斜率; D. 总成本曲线上任意一点的切线的斜率。
【判断题】PE80与PE100两种不同密度PE管相互连接时,可以采用热熔或者PE80管件电熔方式连接。
A.
正确
B.
错误
【判断题】型号为GC-100-PE-340-1.2土工格室高度是100mm。 ( )
A.
正确
B.
错误
【多选题】在短期成本曲线中,SAC曲线是( )
A.
从原点向STC曲线所引射线的斜率
B.
受可变投入的边际报酬递减规律影响呈U型
C.
从原点向可变成本曲线所引射线的斜率
D.
总成本曲线上任意一点的切线的斜率
【多选题】在短期成本曲线中,SAC曲线是( )
A.
从原点向STC曲线所引射线的斜率
B.
受可变投入的边际报酬递减规律影响呈U型
C.
从原点向TVC曲线所引射线的斜率
D.
总成本曲线上任意一点的切线的斜率
【单选题】当PE80管材与PE100管材进行焊接时,宜采用( )。
A.
PE100参数
B.
PE80参数
C.
电熔焊接
D.
热熔焊接
【单选题】在短期成本曲线中,当短期边际成本(MC)达到最低点时,( )。
A.
平均固定成本达到最低
B.
平均可变达到最低
C.
边际产量达到最高
D.
以上均不对
【单选题】公称直径为100的燃气设施,应用下列()表示。
A.
DNI00
B.
E100
C.
PE100
D.
100
【单选题】PE80与PE100两种不同密度聚乙烯(PE)管相互连接时,应采用PE100管件()方式进行连接。
A.
热熔或电熔
B.
热熔
C.
电熔
D.
钢塑转换
【单选题】PE100SDR17.6Φ200PE管与PE80SDR11的注塑管件的连接方式:()
A.
直接热熔连接
B.
PE80材质套筒电熔连接
C.
PE100材质套筒电熔连接
D.
中间接PE80材质短管再热熔连接
相关题目: