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【简答题】
在PN结两端加上电压，PN结内就有电荷的变化，说明PN结具有电容效应。其中外加正偏电压时，（ ）电容起主要作用。
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举一反三
【简答题】C With smart phones taking the world by Storm，a phone that Can only send and receive voice calls and text messages may seem like a relic from a bygone age．Yet in East Africa， phones like these a...
【简答题】阅读理解。 With smart phones taking the world by Storm, a phone that can only send and receive voice calls and text messages may seem like a relic from a bygone age. Yet in East Africa, phones like t...
【简答题】Smart phones can perform ______ tasks.
【简答题】他说的是正确的,事实已经证明了这点。
【单选题】Smart phones can perform tasks.
A.
take advantage of
B.
on a large scale
C.
claim on
D.
a wide variety of
【单选题】With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.
A.
a; a
B.
the; 不填
C.
the；a
D.
不填; a
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