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【简答题】
设某产品的成本函数和收入函数分别为C(x)=100+5x+2x 2 ，R(x)=200x+x 2 ，其中x表示产品的产量，求： (1)边际成本函数、边际收入函数、边际利润函数； (2)已生产并销售25个单位产品，第26个单位产品会有多少利润?
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举一反三
【单选题】an English evening next Sunday?
A.
Is there
B.
Is there be
C.
Will be there
D.
Will there be
【单选题】Beijing somewhat short sighted, she had the habit of _____ at people.
A.
glancing
B.
peering
C.
gazing
D.
scanning
【单选题】( ) 33. Writing compositions in English is not ________.
A.
easy job
B.
an easy work
C.
an easy job
D.
the easy work
【单选题】Our English teacher devoted herself_____to her teaching, which earned her a good reputation in o
A.
33. Our English teacher devoted herself_____to her teaching, which earned her a good reputation in our school. A．strongly
B.
entirely
C.
extremely
D.
Freely
【单选题】— You seem to be familiar with this city! — I ______ English in a school here for two years．It's
A.
33．— You seem to be familiar with this city! — I ______ English in a school here for two years．It's great to be back again! A．taught
B.
have been teaching
C.
had taught
D.
have taught
【单选题】Short-sighted people often ____ at others when they are wearing no glasses.
A.
peer
B.
gaze
C.
stare
【简答题】Beijing somewhat short sighted, she had the habit of ________ at people. A) glancing B) peering C) gazing D) scanning
【单选题】 Being somewhat short sighted, she had the habit of ____ at people.
A.
scanning
B.
glancing
C.
peering
D.
gazing
【简答题】Short-sighted people often _________ at others when they are wearing no glasses.
【判断题】守信是一项财宝,不应该随意虚掷。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
正确
B.
错误
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