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【多选题】
实际电压源模型“20V、2Ω”等效为电流源模型时,其电流源电流为( ),内阻为( )。A.
40A
B.
10A
C.
2Ω
D.
1Ω
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【简答题】广告主题、广告标题、广告正文,与广告媒介之间有怎样的关系?
【单选题】听力原文：M: Why, Mary Smith. I haven't seen you for ages. How have you been? W: John, John Brown. It has been a long time, hasn't it? It must be at least a year. M: No, we talked at the Johnson's Christma...
A.
The National Bank.
B.
The Spanish department.
C.
The Jones and French Company.
D.
A company in Rome.
【单选题】听力原文：M: Why, Ann, I haven't seen you for ages. How have you been? W: Bob, it has been a long time, hasn't it? It must be at least a year. M: No. We talked at the Johnson's Christmas party last Decembe...
A.
Less than a year.
B.
At least one year.
C.
More than a year.
D.
About four months.
【简答题】若关于 的一元二次方程 有两个不相等的实数根，则 的取值范围是 ．
【单选题】听力原文：M: Hello, Sally, haven't seen you for a long time. How have you been doing in your work? W: As a matter of fact, not very well. M: May I ask why? W: The truth is that I want to give up my present...
A.
Because she can not get extra pay.
B.
Because she hopes for more opportunities.
C.
Because she can not bear the dull environment.
D.
Because she dislikes the manager.
【单选题】Hello, David! I haven't heard from you for a long time. How have you been recently?()
A.
That's ok
B.
Long time no see
C.
Not bad, thank you
【简答题】若关于 的一元二次方程 有两个不相等的实数根，则 的取值范围是 。
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