题干

面值100元的新版人民币,其正面正下方的数字“100”,采用了光变色防伪油墨印刷,垂直看为绿色,倾斜看为蓝色,防伪油墨中含有MgF2,其中F的化合价为(  )

A:+1

B:+2

C:-1

D:+3

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答案(点此获取答案解析)

C

同类题1

材料一:文化的发展、创新是任何一个民族文化得以延续的秘密所在。历史上很多古老的文化都因为丧失了创新能力而丧失了生命力,最终不得不面临消失的结局。如:玛雅文明、埃及、古印度、古巴比伦等文明都曾经创造出了辉煌的文化,但都消失了。

 古老的中国文化,今天仍面临巨大的挑战。北京大学张祥龙先生在其著作《思想避难—全球化中的中国古代哲理》中表示:“中国传统文化的主流正面临断子绝孙、无以为继的重大危机。这时还意识不到‘泉涸,鱼相处于陆’的危险,而去奢谈‘中国文化的世纪’的话,是危险的不智。清末人们意识到中国面临‘三千年未有之大变局’,这个生存危机不但没有过去,而且就其文化含义而言,今日变局之险恶有过之而无不及。”张先生的文章博得了广泛的社会关注。身为中华民族的一份子,我们必须严肃的思考如何延续中华传通文化的命脉,让古老的中华文化焕发新生命、新活力的严肃问题。

材料二:十八大报告对科学发展观的阐释内涵更丰富、更深刻、更具体了。科学方法观的提出,不仅是我们党对社会主义市场经济条件下经济社会发展规律在认识上的作用升华,也是我们党执政理念的一个飞跃,更是我们党对马克思主义理论的创新。新时期党的干部教育培训工作必须以科学发展观为指导,与时俱进,努力建设一支高素质的干部队伍,为构建社会主义和谐社会、加快推进社会主义现代化进程提供坚强的思想政治保证、人才保证和智力支持。

同类题3

完形填空,阅读下面短文,然后从各题所给的四个选项中选出一个最佳答案。

    Once there lived two brothers. The elder was called Simon and the younger Victor. They1each other very much, and always took care of one another. Every day they worked from morning2night, getting as much grain(谷物) as possible from their fields.

    One late autumn evening, after their work in the3was done, Simon said to his wife, "Victor got married last month. He has many bills(账单) to pay. I think I will put a bag of rice in his barn(谷仓). “Oh, that's a good idea,” said his wife. “But please don't tell him,” said Simon, “If he knows I put the rice there, he will4take it.”

    So, late that night Simon took a bag of rice to Victor's barn. The next day, while looking at his own barn, he found5strange. “I took a bag of rice to Victor's house last night,6I still have the same number of bags in my barn.7did that happen?”

    Simon decided to take another bag of rice to his brother's barn that night. But the next morning, he found the8number of bags in his barn again! “This is very strange,” he thought. That night he9again. He carried a large bag of rice on his shoulder(肩膀); and walked down the road to his younger brother's house. In the bright moonlight, he could see another10coming down the road. He was carrying something on his11, too. “Younger Brother!” Simon cried, “What are you doing?” “I was 12you, Older Brother,” said Victor, “Your family is13than mine. I thought you needed more rice.” The two brothers quickly14that they had been taking rice to each other. They15what had happened. “It is good to have a brother like you,” they both said. And they lived happily ever after.