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You should _______________ to one or more weekly magazines such as Time or Newsweek.

You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

当晶体三极管____时处于饱和状态。( )
Whether we will go or not __________ the weather.
当温度升高时,二极管的反向饱和电流将__________
Tables______ of stones or wood.
Without water, _________ no plants or animals.
I am wondering if they are ____ or____.
_________ in a person’s speech or writing usually ranges on a continuum from casual or colloquial to formal or polite according to the type of communicative situation.
__________ is the act performed by or resulting from saying something; it is the consequence of, or the change brought about by the utterance.
隔离开关没有专门的___装置,所以不能用它来______负载电流和短路电流。
为了使半导体三极管工作在放大状态,必须使发射结正偏,集电结_______。
All people, whether they be rich or poor, strong or weak, privileged or deprived,are interdependent, and _______ the common task of seeking to achieve mankinds full potential
当温度升高时,晶体三极管集电极电流Ic()(____),发射结压降()(____)。
三极管具有放大作用外部电压条件是发射结()(____),集电结()(____)。
晶体三极管的集电极电流Ic= (____)所以它是(____)控制元件。
晶体三极管具有放大作用时,发射结(____),集电结(____)。
当温度升高时三极管的反向饱和电流I CBO(____)所以Ic也(____) 。
发电机电压调节器(晶体管式)是通过调节发电机的_____________调节发电机电压的,当发电机电压高于规定的电压时,其大功率三极管_____________。
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