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【单选题】
The purpose of the last paragraph is to______.A.
stress that Benjamin Franklin kept the interests of humanity constantly in mind
B.
remind the reader that Franklin remained productive all the way to the end of his life
C.
bring up the topic of Franklin's contribution to politics through the constitutional convention
D.
raise more facts to support the claim that Franklin was a genius
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举一反三
【单选题】We define : V D is the voltagebetween P terminal and N terminal, ID is the current passing through the diode,and it’s direction is from P to N. if >0 and>0, the diode is in the ( ) region
A.
0-bias
B.
forward-bias
C.
reverse-bias
D.
Zener
【单选题】A diode can be usedas a constant-voltage reference in a circuit, the diode is
A.
photodiode
B.
light-emitting diode
C.
Schottky barrier diode
D.
Zener diode
【单选题】Most modern diodes are based on semiconductor ( ). In a p-n diode, conventional current can flow from the ( ) side (the anode) to the ( ) side (the cathode), but cannot flow in the ( ) direction. ( )
A.
p-n junction, p-type, n-type, opposite
B.
p-n junction, n-type, p-type, opposite
C.
n-p junction, A-type, K-type, opposite
D.
p-n junction, A-type, K-type, opposite
【单选题】--: Glad to meet you. :______________
A.
Thank you.
B.
Glad to meet you too.
C.
That’s nice.
【单选题】A:Glad to meet you! B:——
A.
Glad to meet you too
B.
Glad to meet you to
C.
Glad nice to meet you
D.
see you
【单选题】Light-emitting diode emit light when the p-n junction is ___________
A.
forward-biased
B.
reverse-biased
C.
zero biased
D.
operating in the Zener region
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