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【单选题】
推挽功率放大电路比单管甲类功率放大电路A.
输出电压高
B.
输出电流大
C.
效率高
D.
效率低
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举一反三
【简答题】Grammar and independent schools can choose their students.
【简答题】To choose appropriate majors, students can take ______.
【单选题】听力原文：M: How many students will Professor Smith choose to go on the field trip? W: Whether or not there will be a field trip has to be decided first. Q: What does the woman mean? (14)
A.
She feels that the trip will take too long.
B.
The students haven't chosen a professor.
C.
Professor Smith has to choose the destination first.
D.
It's not certain the trip will take place.
【单选题】At the Freshers’ Fair students can choose to join ______.
A.
music and drama clubs
B.
sports clubs
C.
the same clubs as their friends
D.
all kinds of clubs for all interests
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