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【单选题】
若运费最大的运输问题已求得最优解,此时所求出的检验数一定全部( ).A.
大于或等于零
B.
大于零
C.
小于零
D.
小于或等于零
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举一反三
【简答题】Too many grammar and spelling mistakes are likely to lead to a ______.
【简答题】In many school districts, parents usually have only______weeks to ask for switching teachers before the school starts.
【简答题】The strategy of combining grammar rules with ______ was adopted by many foreign language teachers in the 19th century.
【单选题】The English language ____ the grammar and vocabulary that people from many different countries and cultures brought to Britain.
A.
is made of
B.
is consisted of
C.
is made up of
D.
makes up
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