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【多选题】
我国当前实现的总体小康的特点是（）A.
低水平
B.
不全面
C.
发展很不平衡
D.
E.
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【单选题】图 17 所示 电路中,电流 I 和电压 U AB 的值分别为 [ ] 。
A.
I ＝ 2A 、 U AB ＝ 0
B.
I ＝ 3A 、 U AB ＝－ 2V
C.
I ＝－ 3A 、 U AB ＝ 10V
D.
I ＝－ 3A 、 U AB ＝ 0
【简答题】如图1-17所示，已知U S =3V，I S =2A，R 1 =1Ω，R 2 =2Ω，求电路中电压源的电流I和电流源的电压U。
【简答题】请将该英文句子翻译成中文 The power absorbed or supplied by an element is the product of the voltage across the element and the current through it. If the power has a plus sign, power is being delivered to or abso...
【简答题】III. Translate English into Chinese:把下列句子翻译成中文 1. An electric circuit is an interconnection of electrical elements. 2. Electric current is the time rate of change of charge. 3. Voltage (or potential d...
【单选题】If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump _____.
A.
capacity will increase
B.
capacity will decrease
C.
suction pressure will increase
D.
suction pressure will decrease
【单选题】In measuring the output characteristic parameters of solar cells, the ratio of the product of the maximum output power and the product of the short-circuit current and open circuit voltage of solar c...
A.
Conversion efficiency
B.
filling factor
C.
Spectral response
D.
block resistance
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