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【简答题】
Principal : The word can be used as both an adjective and a noun. The principal thing or person in a group is the most important one. P rinciple : The word is only used as a noun. A principle is a basic rule that explains or controls how something works or a guiding rule for behavior. principal principle 1) The _________ aim of the policy is to bring peace to the area.
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举一反三
【单选题】（72） is a collection of data sets, which is so large and complex that it becomes difficult to process using on-hand database management tools or traditional data processing applications.
A.
Big data
B.
Cluster
C.
Parallel computing
D.
Data warehouse
【单选题】Which of the following statements is supported by the passage?
A.
A scientist's most difficult task is testing hypotheses.
B.
It is better to revise a hypothesis than to reject it.
C.
Theories are simply imaginary models of past events.
D.
A good scientist needs to be creative.
【单选题】(That) the sun (but) not the earth (is) the center of our planetary system (was) a difficult concept to grasp in the Middle Ages.
A.
That
B.
but
C.
is
D.
was
【单选题】The public launched a demonstrations against the summit with respect to
A.
political difficulties.
B.
its strong influence.
C.
imaginative ideals.
D.
its social welfare.
【单选题】They didnt feel the least bit frustrated even when they were confronted with ______difficulties.
A.
grave
B.
fantastic
C.
temporary
D.
implicit
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