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【单选题】
人体在作业或进行其他活动时(如进出工作岗位、在工作岗位进行短暂的放松与休息等),人体自由活动所需要的范围称( )。A.
作业接触空间
B.
安全防护空间
C.
作业活动空间
D.
作业休息空间
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【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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