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【单选题】
某单位原来生产产品A,利润为10 000元,现在改生产产品B,所花材料费为18 000元,则生产产品B的机会成本为A.
8 000
B.
10000元
C.
18000
D.
28000
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举一反三
【单选题】The meeting room is so small that it can hold 20 people ________.
A.
at last
B.
at most
C.
at first
D.
at once
【单选题】根据Kennedy分类法,下颌721 1278缺失属于( )。
A.
第一类第一亚类
B.
第二类第一亚类
C.
第二类第二亚类
D.
第三类第二亚类
E.
第四类第二亚类
【简答题】isinstance('abcdefg', str) 的值为 ____________
【单选题】Retirement can be good for people who______.
A.
have always had very busy work lives
B.
can find more stimulating activities than they had through work
C.
have had high-level jobs or very stimulating work experiences
D.
have previously had unsatisfying work experiences
【单选题】Business people abroad who want to make connections with Chinese companies can take the first step using a new Internet site our firm established recently.
A.
contacts
B.
joints
C.
acquaintance
D.
linking
【单选题】Seldom can people on the front page of this popular local newspaper.
A.
人们不会在这份地方报纸前几页上寻找重要的国际新闻。
B.
人们很难在当地这份深受欢迎的报纸头版看到国际新闻。
C.
人们从这份当地发行的报纸第一页上几乎找不到国际新闻。
D.
人们阅读当地发行的报刊时从不查看头版刊登的国际新闻。
【单选题】______ the two buildings there lies a swimming pool in which a lot of people areswimming. You can find Peter ______ them. [ ]
A.
Among; between
B.
Between; between
C.
Among; among
D.
Between; among
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