两电阻相并联,已知 R 1 / R 2 =1/2 ,则流入电阻上的电流之比 I 1 /I 2 、功率之比 P 1 / P 2 分别是()。 A. I 1 / I 2 =2, P 1 / P 2 =4 B. I 1 /I 2 =1/2, P 1 / P 2 =1/2 C. I 1 / I 2 =1/2, P 1 / P 2 =1/4 D. I 1 /I 2 =2, P 1 / P 2 =2
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举一反三
【单选题】The students’ criteria for selecting majors today have much to do with ________.
A.
the influences of their instructors
B.
the financial goals they seek in life
C.
their own interpretations of the courses
D.
their understanding of the contributions of others