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

— ___________________

— Once or twice a week.

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.
Which ________ do you prefer, coffee or orange juice?
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.
外力对质点不做功时,则质点的动量不变 _____。
液压泵是一种 ___ 装置,它将机械能转换为 ___ 是液压传动系统中的动力元件。
系统有某类资源5个,供3个进程共享,如果每个进程最多申请__________个该类资源,则系统是安全的。
设代数系统是环,则是___________群。
Many boys enjoy _______ football, basketball or baseball
Which do you think is ________, health or wealth?
外力对质点不做功时,质点将保持匀速率运动的状态 ______。
若系统的合外力做功为零,则系统的机械能守恒 ______。
_______________will not continue if an ongoing operation is changed or deletedA、
1903年制定的《奏定学堂章程》规定了学校系统,把学校分为___ 、___、___。
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