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24．(6

分)

(1)

(2)_______V

(3)____________Ω

(4)______________________________________________________________________

(5)______________________________________________________________________

22．(2分)

　 23．(2分)

21．(2分)

20. _______________　____________　____________

19．(1)___________　 _____________

(2)___________　 _____________V

(3)______________KW·h　 _______________

18．________　________　__________

17．__________　_________　_____________　_________

16. _________m　_________　_______m　 _________

15．___________　 ____________

14．___________m　____________　 ____________