卫星地球站通过赤道上空约36000km的通信卫星的转发进行通信,视地球站纬度高低,其一跳的单程空间距离为72000~()km。
were, was, had, propaganda, propagandas Large amounts of money ________ spent on ________.
高热、抽搐和 ___________是乙型脑炎极期的严重症状,三者相互影响。
上消化道出血病因诊断的首选检查方法是___________。
发散性思维的基本方法主要有提问法、语词运算法和____。
To trade ____ the people of all eoun tries ____ the basis of equality and mutual ben efit is our established policy.
is, are, was, were, will be, are going to be, have, has, had The beautiful ________ something that the innocent ________ not always able to appreciate fully.
根据生活起居护理的要求,病人起居应适应四时气候变化,要遵循()、()的原则。
费斯廷格提出了()理论。
多饮水,勤( ), 是预防尿路感染简单而有效的措施。
He said that he ____ (feed) up with college instructors who tried to teach him to use the “ scientific