【判断题】通常的BJT管在集电极和发射极互换使用时,仍有较大的电流放大作用。()
【判断题】通常的BJT在集电极和发射极互换使用时,仍有较大的电流放大作用。 ( X)
【判断题】通常的双极型晶体管BJT在集电极和发射极互换使用时,仍有较大的电流放大作用。
【单选题】______the people directly involved in the tourist industry may benefit, others may find that they are worse off.
【判断题】通常的BJT在集电极和发射极互换使用时,仍有较大的电流放大作用
【单选题】Paul Aboh
A.
A rich person is not necessarily happy.
B.
Things people often overlook may be the very source of happiness.
C.
Happiness can be promoted on a scientific basis.
D.
We should mainly rely on ourselves for happiness.
E.
Happiness lies in giving instead of taking.
F.
The environment is a source of happiness.
G.
Happiness can be achieved if we stick to the best of our values.
【简答题】设 X 是 a =0 ,σ=1 的高斯随机变量,试确定随机变量 Y = cX + d 的概率密度函数 f ( y ) ,其中 c , d 均为常数。
【单选题】Other people may celebrate the lofty conversations in which the great minds are supposed to have indulged in the great salons of 18 th century Paris.
【单选题】下列说法不正确的是( )。
A.
实际电压源等效为理想电压源与一个电阻的串联。
B.
实际电流源等效为理想电流源与一个电阻的串联。