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【单选题】
根据模型,一旦经济发生偏离,总是会收拢到k=()。
A.
-1
B.
1
C.
0
D.
2
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A.
强度大
B.
安全、有效
C.
动作变化丰富
D.
复杂多样
【简答题】According to the passage, what happened in 2006? A) 21% of pupils didn’t meet the Government’s expected standard. B) The target set for 2006 was 87 percent. C) £2.3 billion was spent on math teaching....
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【简答题】已知a= ,b=9.求: (1) (2) .
【判断题】在 RLC 串联 正弦 交流电路中, 计算 电源电压 的公式 为 。( )
A.
正确
B.
错误
【简答题】(1)8÷11 (2)13÷6 (3)54÷9.
【单选题】在RLC串联正弦交流电路中,有功功率P等于( )。
A.
P=I 2 R
B.
P=U R Icosψ
C.
P=UI
D.
P=S-Q
【单选题】According to the passage, Pat didn't ______.
A.
want to be like his uncle in every way
B.
try to make the sounds of a bird singing
C.
like to go to school
D.
go to school across the forest
【单选题】在RLC串联正弦交流电路中, , , ,则该电路总电压U为( )。
A.
40V
B.
50V
C.
70V
D.
150V
【简答题】有几种填法.1-______/9<3/9.
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