把一条电阻为64Ω的均匀电阻丝截成等长的n段后,再并联起来,电阻变为1Ω,则n等于_________。
8
根据并联电路的特点:
,
由题意nR=64
解得,n=8
商品房建设投资额
Her teacher thinks ()of others.
A. high
B. highly
C. well
D. good