题目内容

把RNA转移到硝酸纤维素膜上的技术叫()

A. Southern blotting
B. Northern blotting
C. Western blotting
D. Eastern blotting

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Which of the following biasing combinations is not normally associated with one of the three transistor operating regions()

A. E-B junction = forward, C-B junction = reverse
B. E-B junction = reverse, C-B junction = reverse
C. E-B junction = reverse, C-B junction = forward
D. All of the above

VCE is measured ______()

A. from the emitter terminal to ground
B. from the collector terminal to the emitter terminal
C. from the collector-emitter junction to ground
D. None of the above

In the saturation 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 reversed-biased
D. is reversed-biased while the base-collector junction is forward-biased

When a BJT is biased in the cutoff region the collector-to-emitter voltage is typically equal to ____()

A. the emitter voltage
B. 0.03V
C. the collector current times the collector resistor
D. the collector supply voltage

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