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【单选题】
如图所示的简单管路,现将阀门开度减小,试定性分析阀门前压力表读数pA()。A.
减小
B.
不确定
C.
不变
D.
增大
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举一反三
【简答题】按键()控制显示或隐藏平面图边框。
【单选题】When Adam Smith spoke of the principle of the 'invisible hand' , he meant that______.
A.
the government regulates all firms in such a manner that the 'social responsibility' of business is assured
B.
the pursuit of one's own self-interest will lead to the best good for all
C.
cooperation among producers is necessary to minimize losses
D.
governmental intervention in the marketplace may be necessary to have steady growth in national output
【单选题】He was in extreme state of distress and depression when he knew that he had ______ lung cancer.
A.
extracted
B.
contracted
C.
abstracted
D.
attracted
【简答题】He always ______________(忠于) his principle.
【单选题】Esquith's principle of teaching is different from the general one in that ______.
A.
he dismisses the concept of extra homework for students
B.
he pays less attention to students' academic performances
C.
he insists on giving harder lessons to more advanced students
D.
he places greater emphasis on hard work in students' learning
【简答题】8279最多可同时控制多少个按键？
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