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【多选题】
下列关于微波炉的表述中，正确的是( )。A.
微波炉可以适用金属器皿加热食品
B.
微波炉的加热原理是利用电能转化为电磁能，再将电磁能转化为热能
C.
微波炉加热均匀，热效率高，卫生无污染
D.
微波炉是一种用微波加热食品的现代化烹凋灶具，微波是一种电磁波
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【单选题】The new trend in artificial intelligence research stems from______.
A.
the shift of the focus of study on to the recognition of the shapes of objects
B.
the belief that human intelligence cannot be duplicated with logical, step-by-step programs
C.
the aspirations of scientists to duplicate the intelligence of a ten-month-old child
D.
the efforts made by scientist in the study of the similarities between transistors and brain cells
【简答题】网络信息服务商提供的大部分信息属于()。 [A]免费商务信息 [B]优质优价的信息 [C]收取标准费用的信息 [D]收取较低费用的信息
【单选题】Which of the following made the Americans neglect the current immigration flood?
A.
The focus on the social and cultural costs and benefits of immigration.
B.
The distinction they made between immigrants.
C.
The lack of recognition of the immigrants' economic influence.
D.
The lack of recognition of the immigrants' differences.
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