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【单选题】
在甲类、乙类、甲乙类放大电路中,其导通角分别为A.
小于180 O 、180 O 、360 O
B.
360 O 、180 O 、大于180 O 小于360 O
C.
180 O 、小于180 O 、360
D.
大于180 O 小于180 O 180
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举一反三
【单选题】Who was supposed to be the world’s champion sleepwalker?
A.
The man walked sixteen miles along a dangerous road.
B.
The boy walked five hours in his sleep.
C.
The student habitually walked to the Iowa River and swam in his sleep.
D.
The man danced a minuet in his sleep.
【单选题】For any Englishman, there can never be any discussion as to who is the world's greatest poet and greatest dramatist. Only one name can possibly suggest itself to him: that of William Shakespeare. Ever...
A.
have never discussed who is the world's greatest poet and greatest dramatist
B.
never discuss about the world's? greatest poets or dramatists
C.
are sure who is the world's greatest poet and greatest dramatist
D.
do not care who is the world's greatest poet and greatest dramatist
【简答题】[l] Imagine waking up to a world where China is the world's leading superpower, astronauts are busy walking on Mars and a brand new political party is ruling the UK? Well, this could be die reality in...
【单选题】For any Englishman there can never be any discussion as to who is the world's greatest poet and greatest dramatist. Only one name can possibly suggest itself to him: that of William Shakespeare. Every...
A.
have never discussed who is the world's greatest poet and greatest dramatist
B.
never discuss the world's great poets or dramatists
C.
do not care who is the world's greatest poet and greatest dramatist.
D.
are sure who is the world's greatest poet and greatest dramatist
【简答题】已知 ,则a= ,b= 。焦点在 轴。
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