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【单选题】
如果某种商品的边际效用等于0,那么( )。A.
该商品不具效用
B.
该商品的总效用也为0
C.
消费者能在该商品上获得的效用已经达到最大
D.
肯定符合价值悖论的观点
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举一反三
【单选题】Both parents and teenagers should try their best to communicate more with each other and the gap (差距) between them. [ ]
A.
open
B.
adjust
C.
narrow
D.
reduce
【单选题】Both parents should take equal responsibilities for the ________ needs of their children.
A.
typical
B.
honest
C.
emotional
【多选题】位于大山深处、柳林县金家庄乡金家庄村的“览虫书屋”,成为吕梁山上一道亮丽风景。“它已成为金家庄全体乡民的一个书屋、一个文化活动平台、一个精神家园。”初步判断这件事适合写成通讯,理由是:()
A.
这里有丰富的细节内容可以挖掘。
B.
偏僻地区的书屋，更显与众不同，有新意，
C.
书屋的开办对山村的振兴发挥了巨大作用。
D.
事实所体现的意义很重要。
【简答题】某施工合同在履行过程中，承包人提出使用专利技术，工程师同意，则下列各个申报手续和费用承担的表述，正确的是（ ）。
【简答题】The onus is on governmentdepartments to tell why information cannot be disclosed.A. blame B. concern C. responsibility
【单选题】Both parents and teenagers should try their best to communicate more with each other and _____ the gap between them. [ ]
A.
open
B.
adjust
C.
narrow
D.
reduce
【简答题】放大从零频到高频信号的宽带放大器采用( )耦合方式,放大从低频到高频信号的宽带放大器采用( )耦合方式。
【单选题】Why cannot aeroplanes fly very high?
A.
It's because the air gets thinner when planes get higher.
B.
It’s because there is not enough fuel.
C.
It's because the pilots cannot breathe without air.
D.
It's because airplanes are very big and heavy.
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