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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.

Whether we will go or not __________ the weather.
若要求放大电路输入电阻高,且稳定输出电压,在放大电路中应引入的负反馈组态为_______。
Tables______ of stones or wood.
可以放大电压,但不能放大电流的是_________组态放大电路。
在放大电路的输入量保持不变的情况下,若引入反馈后_________,则说明引入的反馈是负反馈。
在反馈放大电路中,如果反馈信号和输出电流成正比,称为_________反馈。
为了稳定放大电路的输出电流,应引入_________负反馈。
一个单管共射放大电路如果通过电阻引入负反馈,则_________。
既能放大电压,也能放大电流的是_________组态放大电路。
电压串联负反馈放大电路的反馈系数称为_________反馈系数。
Fi 是_________ 放大电路的反馈系数。
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.
在反馈放大电路中,如果反馈信号和输出电压成正比,称为_________反馈。
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
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