长方形相邻的两边是______的,相对的两边是______的.

题型:填空题

问题:

长方形相邻的两边是______的,相对的两边是______的.

考点:正方形、长方形的认识
题型:填空题

生活离不开化学,化学与生活息息相关.

(1)2012年2月,国务院同意发布新修订的《环境空气质量标准》增加了PM2.5监测指标.人们常戴上口罩以防止颗粒物进入肺部,戴口罩与化学中的______原理相似(填实验操作名称).

(2)世界卫生组织推广使用中国铁锅.炒菜时放点食醋,可以补充人体需要的微量元素是______元素.

(3)均衡膳食有益健康.下列食物中,富含蛋白质的是______(填字母).

a.牛奶            b.土豆           c.鸡蛋      d.蔬菜

(4)餐具上的油污用加入洗洁精的水更容易洗掉,原因是洗洁精具有______作用.

(5)泡打粉是一种化学膨松剂,主要是通过碳酸氢钠与一些酸性成分发生化学反应产生______气体而起到发泡作用.

(6)吸烟有害健康.香烟烟气中含有几百种对人体有害的物质,如尼古丁、焦油、一氧化碳、二氧化碳等,其中与血红蛋白结合能力强的有毒气体是______.

题型:填空题


The central problem of economics is to satisfy the people’s and nation’s wants. The problem we are faced with is that our (1) , here identified as money, are (2) . The only way we can resolve our (3) is to make choices. After looking at our resources, we must examine our list of (4) and identify the things we need (5) , those we can postpone, and (6) we cannot afford. As individuals, we face the central problem involved in economics — deciding just how to allocate our limited resources to provide ourselves with the greatest (7) of our wants.
Nations face the same problem. As a country’s population (8) , the need for more goods and services grows (9) . Resources necessary to production may increase, but there are (10) enough resources to satisfy the total desires of a (11) . Whether the budget meeting is taking place in the family living-room, in the conference room of the corporation (12) of directors, or in the chamber of the House of Representatives in Washington, the basic problem still exists. We need to find (13) of allocating limited resources in order to satisfy unlimited wants.
A short time ago, economists divided goods into two categories, free and economic. The former, like air and water, were in (14) abundance that economists had no concern about (15) of scarcity and what to do about it. Today many of these "free goods" are in (16) very expensive to use. Pollution has made clean air and water expensive for producers who have to filter their waste products, for consumers who ultimately pay for the producers’ extra costs, and (17) tax-payers who pay for the government’s involvement in cleaning the environment.
In the 1990s, almost all goods are (18) . Only by effort and money can they be (19) in the form people wish.
Meeting the needs of people and the demands from resources available leads to the basic activity of production. In trying to (20) unlimited wants from limited economic goods, production leads to new problems in economics.

题型:填空题

工作负责人、工作许可人任何一方不得擅自变更(),特殊情况需要变更时,应先取得()同意并及时恢复。

题型:填空题

总部新下发制度要求,各部门在每月()日前将审批后的次月的物资需求月计划报送采购部。

A、15日

B、18日

C、20日

D、25日

题型:填空题

财产权是实现()权利的基本保证。

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