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【判断题】
若线性规划问题的最优解存在,则最优解或最优解之一(如果有无穷多的话)一定是可行域的凸集的某个顶点。A.
正确
B.
错误
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【单选题】How does the Georges Building differ from nearby buildings?
A.
It is made from different materials.
B.
It is made from a different architectural style.
C.
It is larger than the other buildings.
D.
It is a much taller building.
【单选题】It is in their ability to speak________humans________from animals. [ ]
A.
which；differ
B.
that；different
C.
which；different
D.
that；differ
【单选题】The twins look alike, but they _____ each other in temperament. [ ]
A.
different from
B.
differ from
C.
transform
D.
distinguish
【单选题】To understand the culture of different places, especially ______ containing as many different subcultures as the United States, is necessary for everyone in today's internet world.
A.
one
B.
the one
C.
that
D.
such
【简答题】一台三相二极异步电动机,如果电源的频率 f 1 =50Hz ,则定子旋转磁场每秒在空间 转 转。
【单选题】Can you find _____ in the newspaper? [ ]
A.
things different
B.
different something
C.
anything different
D.
different anything
【单选题】The sound clicks differ from the squeals in that______.
A.
they are different in speeds of spreading
B.
they are different in wave length
C.
they are different in tones
D.
they are different in volumes
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