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【单选题】
晶体管参数f T 是指（）。A.
共射放大器，没有电流放大倍数时，对应的频率称为f T
B.
当晶体管失去电流放大能力时的频率称为f T
C.
当频率升高时，当β的模值下降到1时的频率称为f T
D.
当频率升高时，当β的模值下降到 时的频率称为f T
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【简答题】病原菌感染的途径有哪些?
【单选题】Goods with many close substitutes tend to have _________.
A.
price elasticities of demand that are unit elastic
B.
more elastic demands
C.
income elasticities of demand that are negative
D.
less elastic demands
【单选题】Many of the electric goods which are advertised as ______ the modern woman tend to have the opposite effect.
A.
liberate
B.
to liberate
C.
liberating
D.
liberated
【简答题】When should the goods have been delivered? The goods should have been delivered ______.
【单选题】Many of the electric goods which are advertised as ______ the modem woman tend to have the opposite effect.
A.
liberate
B.
to liberate
C.
liberating
D.
liberated
【简答题】常见的病原菌感染途径有哪些?
【单选题】Many goods have little or no form of packing and are carried __ .
A.
quickly
B.
bare
C.
faster
D.
loose
【单选题】Goods with many close substitutes tend to have
A.
more elastic demands.
B.
less elastic demands.
C.
price elasticities of demand that are unit elastic.
D.
income elasticities of demand that are negative.
【简答题】We have been an importer of
industrial goods for many years.
【简答题】改错：Many of the home electric goods which are advertised as liberating the modern women tend to have the opposite effectMany of the home electric goods which are advertised as liberating the modern wom...
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