Increasing the temperature of a forward-biased diode ______（）
A. causes forward current to increase
B. causes forward current to decrease
C. has no significant effect on the forward current
D. None of these
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In the cut-off region, the base-emitter junction _____（）
A. and the base-collector junctions are both forward-biased
B. and the base-collector junctions are both reverse-biased
C. is forward-biased while the base-collector junction is reverse-biased
D. is reversed-biased while the base-collector junction is forward-biased
The transition capacitance of a diode is a shunt capacitive effect that occurs when the diode _____（）
A. is large
B. is small
C. is forward-biased
D. is reverse-biased
将一定量的KClO3加热后，其质量减少0.48g。生成的氧气用排水集气法收集，若温度为21℃，压力为99591.8Pa，水的饱和蒸汽压为2479.8Pa，氧气的相对分子质量为32.0，则收集的气体体积为（）
A. 188.5
B. cm3
C. B．754
D. cm3
E. C．565.4
F. cm3
G. D．377.6
H. cm3
The author of the Wealth of Nations was（）
A. David Ricardo
B. Paul Samuelson
C. Adam Smith
D. Karl Marx
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