Woman: Mr. Scott came back from L.A.very late yesterday. Man: So, even if he had been able to attend the party, he would have arrived late. Question: What do we learn about Mr. Scott?
A.
Mr. Scott was late for the party.
B.
Mr. Scott didn't attend the party at all.
C.
Mr. Scott attended the party.
D.
Mr. Scott did not like attending parties.
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举一反三
【单选题】图 4.2 所示 电路中 N 为有源线性电阻网络,其 ab 端口开路电压为 30 V , 当把安培 表接在 ab 端口时 ,测得电流为 3A ,则 若把 10Ω 的电阻接在 ab 端口时 , ab 端电压 为:( )