The issues in the debate on Harvards goals are whether theuniversities should remain independent of our society and its problems, andwhether they should __________.
A.
fight off militarism
B.
exert greater influence upon the young generation
C.
take an active part in solving the societys ills
D.
reconsider the structure of institutes and departments
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参考答案:
举一反三
【单选题】一个负载 R L 经理想变压器接到信号源上,已知信号源的内阻 R 0 = 800 欧姆 ,变压器的变比 k =10 。若该负载折算到原边的阻值正好与 R 0 达到阻抗匹配,则可知负载 R L 为