到2020年,中国农业发展的目标是()。 A.资源浪费型、环境友好型 B.资源节约型

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问题:

到2020年,中国农业发展的目标是()。

A.资源浪费型、环境友好型

B.资源节约型、环境敌对性

C.资源节约型、环境友好型

D.资源浪费型、环境敌对型

考点:中国经济概论中国经济概论题库
题型:单项选择题

已知R2+有b个中子,核外有a个电子,表示R原子符号正确的是[ ]

A.baR           

B. a+b-2a-2R          

C. a+b+2a+2R         

D. a+ba-2R

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(7分)某物质可能含有炭粉、CaCO3、CuO、Fe2O3中的一种或几种。现进行如下实验:

(1)取样品,加热至高温,产生一种能使澄清石灰水变浑浊的无色气体。

(2)往冷却后的固体残渣中加入足量的稀HCl,固体残渣全部溶解,同时产生一种可燃气体。

根据上述实验推断:该物质中一定含有________,一定不含有________,可能含有________。写出有关反应的化学方程式,属于氧化还原反应的,标出电子转移的方向和数目。属于离子反应的,写出离子方程式。

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底烘

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The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride’s dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.
The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short
supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.
Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women’s responsibility.

题型:单项选择题

安全监控仪器及设备校正包括哪些内容?

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