NA表示阿伏加德罗常数的值,下列说法正确的是() A.7.0g乙烯与丙烯的混合物

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问题:

NA表示阿伏加德罗常数的值,下列说法正确的是( )

A.7.0g乙烯与丙烯的混合物中氢原子数为NA

B.常温下,1molC5H12中含有共价键数为17NA

C.17g 羟基中含有电子数为10NA

D.标准状况下,22.4L苯中含分子数为NA

考点:物质的量
题型:选择题

按顺序排列词语。

1.高雄  华南  中国  台湾  亚洲

_______________________________________

2.闽南语  语言  方言  汉语

_______________________________________

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The first and most important agents of socialization are the people who care for infants. In the earliest months, messages from nurturers constitute the child’s basic understanding of the world around it. This is the infant’s first introduction to the language that shapes perception and elicits emotion.
Another powerful source of information and socialization is the friendship of peers. Peers are equals that one can deal with on the same level as oneself, whereas parents are superiors. The heavy emotional overlay of family relationships makes some kinds of learning difficult.
Much formal socialization is placed in the hands of professionals. Teachers from kindergarten on are specifically designated agents of socialization. Ideally, a teacher is one who has both knowledge and the skills to present it. During the course of teaching their subjects, classroom instructors provide role models and attempt to convey the excitement of learning itself.
In earlier times, parents, friends and teachers would comprise the list of primary childhood socializers. Children’s books, comics and magazines might also have been mentioned as sources of information on norms and role models. Today one must add three powerful indirect or non-personal socialization agents: radio, movies and television. Many people learn about politics, form a vision of well-being, and develop attitudes towards others from what they see on the screen and hear through the speakers.

Which of the following statements is NOT true

A.Language shapes an infant’s perception.

B.Language elicits an infant’s emotions.

C.Language forms an infant’s cultural awareness.

D.Language forms an infant’s basic understandin

题型:选择题

条形码所代表的某种产品不再生产时,其对应的产品代码可以重复起用,再分配给其它商品。

题型:选择题

根据数据模型的不同,可将数据库分为哪几类?最常用的数据库是哪一类?

题型:选择题

下列有关预算收支编制要求中不正确的是()

A、各级预算收入的编制,应当与经济社会发展水平相适应,与财政政策相衔接

B、各级政府应当依法将所有的政府收入全部列入预算,不得隐瞒、少列

C、预算收入的编制应当贯彻勤俭节约的原则

D、各级一般公共预算支出的编制,应当统筹兼顾

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