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【多选题】
RC桥式振荡电路为了满足振荡条件,要求其中的放大电路应满足:A.
同相放大
B.
Au >3
C.
Au <3
D.
采用负反馈稳定幅度
E.
反相放大
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反馈参考答案：
举一反三
【简答题】The sun rises in the east and sets in the west，so it seems as if the sun__________round the earth. A．were circling B．circles C．is circling D．be circling
【单选题】设q表示产品产量,p表示产品价格,公式∑p1q1-∑p0q1的经济意义是( )。
A.
反映产值变动的绝对额
B.
反映产品产量变动的绝对额
C.
反映由于产品价格变化而使产值变动的绝对额
D.
反映由于产品产量变化而使产值变动的绝对额
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
investigate
B.
implement
C.
motivate
D.
accommodate
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
discard
B.
investigate
C.
modify
D.
marshal
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
conclude
B.
discover
C.
investigate
D.
Infer
【简答题】The sun rises in the east.
【单选题】Instead of ignoring or envying successful students, I made it my mission to ____ the mysterious causes of their success and greatness.
A.
appreciate
B.
create
C.
investigate
D.
decorate
【单选题】The sun rises in the east and sets in the west, so it seems as if the sun______round the earth.
A.
were circling
B.
circles
C.
is circling
D.
be circling
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
investigate
B.
enlighten
C.
fluctuate
D.
implement
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