1.  >>  河南成教 / 小学教育科研方法
 河南成教 / 小学教育科研方法


[简答题]
简述分层抽样法。
 参考答案:
 佳题速递:
  • [简答题] 教师职业道德的基本原则有哪些?教师职业道德
  • [多选题] 下面属于系统消息4的信息是( ) A.连接状态下的小区选择和重选参数 B.空闲状态下的小区选择和重选参数 C.连接状态下的小区接入参数 D.空闲状态下的小区接入参数通信原理
  • [多选题] 行政决策除了具备一般决策的特征之外,还具有自身的特征,主要表现为:( ) A.行政决策主体的确定性 B.行政决策的广泛性 C.行政决策依据的法律性 D.行政决策实施的强制性 E.行政决策目标的非营利性行政管理学
  • The water we drink and use is running short in the world. We all have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field. Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again, just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Then we could turn to the oceans. All we'd have to do to make use of the seawater on earth is to get rid of the salt. This process is called desalinization, and it is already in use in many parts of the world. (1)The way to stop wasting our limited water is to _ _ _ _ _ _ _ _ .(2分)A、do experiments with waterB、purify the used water and reuse itC、use fresh water once againD、make use of seawater(2)The following tells us how to reuse the used water. Which is the right order of the passage?(2分)A、to have the used water filteredB、to put chemicals in itC、to pipe it to the usersD、to pipe the used water to be purified to a factory(3)There wouldn't be enough water for us if we didn't _ _ _ _ _ _ _ _ _ .(2分)A、turn to the oceans for more waterB、reuse used water and make use of seawaterC、desalt seawaterD、take steps to reuse all water on earth(4)The word "it" in the last sentence refers to _ _ _ _ _ _ _ .(2分)A、seawaterB、purified waterC、the process of getting rid of the salt in seawaterD、the process of collecting salt from the sea oceans(5)The best title for the passage is " _ _ _ _ _ _ _ ".(2分)A、How to Reuse WaterB、Two Solutions to the Problem of Water ShortageC、Stop Wasting Our Limited WaterD、How to Make Use of Seawater新发展英语综合教程(二)
  • 新世纪职业道德建设总体目标是: 、 、 、 和积极推进师德建设工作改进创新。 教师职业道德与规范
  • 译码方式可分为全地址译码和部分地址译码。 微机系统与接口技术