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Most Americans would prefer to keep their problems themselves, and solve their problems ______ themselves.
A. to; by B. by; to C. for; to D. in; on
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The government gave several good ________ for increasing the tax on cigarettes.
A.purposesB.reasonsC.questionsD.problems
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An expert system is a software that(41)specialist knowledge-about a particular domain of(42)and is capable of making(43)decisions with in that domain. Although expert systems typically focus on a very narrow domain, they have achieved dramatic success with(44)problems, This has excited wide spread interest outside the research laboratories from which they emerged.Expert systems have given rise to a set of "knowledge engineering" methods constituting a new approach to design of high performance software system. This new approach represents an(45)change with revolutionary consequences.A．developsB．directoryC．effectD．encapsulatesE．evolutionary
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Which of the following describes the paradox of the schools?A.Discrepancy between what they say and what they do.
B.Differences between teachers' problems and schools' problems.
C.Advantages and disadvantages of students’ learning opportunities.
D.Students' perception and the reality of their performance on assessments.
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Problems ______ if the parents approach to discipline is inconsistent.A.reach
B.arise
C.anchor
D.seize
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关于求解命令solve使用错误的是 （)A．solve(f,x)B．solve(f)C．solve(f,f)D．solve(’f’)
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